php redis集群 RedisCluster类

爱被打了一巴掌 2022-04-24 09:56 517阅读 0赞

<?php
    
    /**
     * Helper autocomplete for php redis cluster extension.
     * Based on the phpredis-phpdoc by Max Kamashev (https://github.com/ukko/phpredis-phpdoc)
     *
     * @author Tommy Zheng <tommy@vlv.pw>
     * @link   https://github.com/zgb7mtr/phpredis-cluster-phpdoc
     *
     * @method mixed eval($script, $args = array(), $numKeys = 0)
     *
     */
    class RedisCluster {
        const AFTER = 'after';
        const BEFORE = 'before';
    
        /**
         * Options
         */
        const OPT_SERIALIZER = 1;
        const OPT_PREFIX = 2;
        const OPT_READ_TIMEOUT = 3;
        const OPT_SCAN = 4;
        const OPT_SLAVE_FAILOVER = 5;
    
        /**
         * Cluster options
         */
        const REDIS_OPT_FAILOVER = 5;
        const REDIS_FAILOVER_NONE = 0;
        const REDIS_FAILOVER_ERROR = 1;
        const REDIS_FAILOVER_DISTRIBUTE = 2;
        const REDIS_FAILOVER_DISTRIBUTE_SLAVES = 3;
    
        /**
         * SCAN options
         */
        const SCAN_NORETRY = 0;
        const SCAN_RETRY = 1;
    
        /**
         * Serializers
         */
        const SERIALIZER_NONE = 0;
        const SERIALIZER_PHP = 1;
        const SERIALIZER_IGBINARY = 2;
    
        /**
         * Multi
         */
        const ATOMIC = 0;
        const MULTI = 1;
        const PIPELINE = 2;
    
        /**
         * Type
         */
        const REDIS_NOT_FOUND = 0;
        const REDIS_STRING = 1;
        const REDIS_SET = 2;
        const REDIS_LIST = 3;
        const REDIS_ZSET = 4;
        const REDIS_HASH = 5;
    
        /**
         * Creates a Redis Cluster client
         *
         * @param string | null mixed $name
         * @param array         $seeds
         * @param float         $timeout
         * @param float         $readTimeout
         * @param bool          $persistent
         *
         * @example
         * <pre>
         * // Declaring a cluster with an array of seeds
         * $redisCluster = new RedisCluster(null,['127.0.0.1:6379']);
         *
         * // Loading a cluster configuration by name
         * // In order to load a named array, one must first define the seed nodes in redis.ini.
         * // The following lines would define the cluster 'mycluster', and be loaded automatically by phpredis.
         *
         * // # In redis.ini
         * // redis.clusters.seeds = "mycluster[]=localhost:7000&test[]=localhost:7001"
         * // redis.clusters.timeout = "mycluster=5"
         * // redis.clusters.read_timeout = "mycluster=10"
         *
         * //Then, this cluster can be loaded by doing the following
         *
         * $redisClusterPro = new RedisCluster('mycluster');
         * $redisClusterDev = new RedisCluster('test');
         * </pre>
         */
        public function __construct($name, $seeds, $timeout = null, $readTimeout = null, $persistent = false) { }
    
        /**
         * Disconnects from the Redis instance, except when pconnect is used.
         */
        public function close() { }
    
        /**
         * Get the value related to the specified key
         *
         * @param   string $key
         *
         * @return  string|bool: If key didn't exist, FALSE is returned. Otherwise, the value related to this key is
         *                       returned.
         *
         * @link    http://redis.io/commands/get
         * @example
         * <pre>
         * $redisCluster->get('key');
         * </pre>
         */
        public function get($key) { }
    
        /**
         * Set the string value in argument as value of the key.
         *
         * @since    If you're using Redis >= 2.6.12, you can pass extended options as explained in example
         *
         * @param   string    $key
         * @param   string    $value
         * @param   int|array $timeout If you pass an integer, phpredis will redirect to SETEX, and will try to use Redis
         *                             >= 2.6.12 extended options if you pass an array with valid values.
         *
         * @return  bool TRUE if the command is successful.
         *
         * @link     http://redis.io/commands/set
         * @example
         * <pre>
         * // Simple key -> value set
         * $redisCluster->set('key', 'value');
         *
         * // Will redirect, and actually make an SETEX call
         * $redisCluster->set('key','value', 10);
         *
         * // Will set the key, if it doesn't exist, with a ttl of 10 seconds
         * $redisCluster->set('key', 'value', Array('nx', 'ex'=>10));
         *
         * // Will set a key, if it does exist, with a ttl of 1000 miliseconds
         * $redisCluster->set('key', 'value', Array('xx', 'px'=>1000));
         * </pre>
         */
        public function set($key, $value, $timeout = null) { }
    
        /**
         * Returns the values of all specified keys.
         *
         * For every key that does not hold a string value or does not exist,
         * the special value false is returned. Because of this, the operation never fails.
         *
         * @param array $array
         *
         * @return array
         *
         * @link http://redis.io/commands/mget
         * @example
         * <pre>
         * $redisCluster->del('x', 'y', 'z', 'h');    // remove x y z
         * $redisCluster->mset(array('x' => 'a', 'y' => 'b', 'z' => 'c'));
         * $redisCluster->hset('h', 'field', 'value');
         * var_dump($redisCluster->mget(array('x', 'y', 'z', 'h')));
         * // Output:
         * // array(3) {
         * // [0]=>
         * // string(1) "a"
         * // [1]=>
         * // string(1) "b"
         * // [2]=>
         * // string(1) "c"
         * // [3]=>
         * // bool(false)
         * // }
         * </pre>
         */
        public function mget(array $array) { }
    
        /**
         * Sets multiple key-value pairs in one atomic command.
         * MSETNX only returns TRUE if all the keys were set (see SETNX).
         *
         * @param   array $array Pairs: array(key => value, ...)
         *
         * @return  bool    TRUE in case of success, FALSE in case of failure.
         * @link    http://redis.io/commands/mset
         * @example
         * <pre>
         * $redisCluster->mset(array('key0' => 'value0', 'key1' => 'value1'));
         * var_dump($redisCluster->get('key0'));
         * var_dump($redisCluster->get('key1'));
         * // Output:
         * // string(6) "value0"
         * // string(6) "value1"
         * </pre>
         */
        public function mset(array $array) { }
    
        /**
         * @see     mset()
         *
         * @param   array $array
         *
         * @return  int 1 (if the keys were set) or 0 (no key was set)
         * @link    http://redis.io/commands/msetnx
         */
        public function msetnx(array $array) { }
    
        /**
         * Remove specified keys.
         *
         * @param   int | array $key1 An array of keys, or an undefined number of parameters, each a key: key1 key2 key3
         *                            ... keyN
         * @param   string      $key2 ...
         * @param   string      $key3 ...
         *
         * @return int Number of keys deleted.
         * @link    http://redis.io/commands/del
         * @example
         * <pre>
         * $redisCluster->set('key1', 'val1');
         * $redisCluster->set('key2', 'val2');
         * $redisCluster->set('key3', 'val3');
         * $redisCluster->set('key4', 'val4');
         * $redisCluster->del('key1', 'key2');          // return 2
         * $redisCluster->del(array('key3', 'key4'));   // return 2
         * </pre>
         */
        public function del($key1, $key2 = null, $key3 = null) { }
    
        /**
         * Set the string value in argument as value of the key, with a time to live.
         *
         * @param   string $key
         * @param   int    $ttl
         * @param   string $value
         *
         * @return  bool:   TRUE if the command is successful.
         * @link    http://redis.io/commands/setex
         * @example
         * <pre>
         * $redisCluster->setex('key', 3600, 'value'); // sets key → value, with 1h TTL.
         * </pre>
         */
        public function setex($key, $ttl, $value) { }
    
        /**
         * PSETEX works exactly like SETEX with the sole difference that the expire time is specified in milliseconds
         * instead of seconds.
         *
         * @param   string $key
         * @param   int    $ttl
         * @param   string $value
         *
         * @return  bool:   TRUE if the command is successful.
         * @link    http://redis.io/commands/psetex
         * @example
         * <pre>
         * $redisCluster->psetex('key', 1000, 'value'); // sets key → value, with 1s TTL.
         * </pre>
         */
        public function psetex($key, $ttl, $value) { }
    
        /**
         * Set the string value in argument as value of the key if the key doesn't already exist in the database.
         *
         * @param   string $key
         * @param   string $value
         *
         * @return  bool:   TRUE in case of success, FALSE in case of failure.
         * @link    http://redis.io/commands/setnx
         * @example
         * <pre>
         * $redisCluster->setnx('key', 'value');   // return TRUE
         * $redisCluster->setnx('key', 'value');   // return FALSE
         * </pre>
         */
        public function setnx($key, $value) { }
    
        /**
         * Sets a value and returns the previous entry at that key.
         *
         * @param   string $key
         * @param   string $value
         *
         * @return  string  A string, the previous value located at this key.
         * @link    http://redis.io/commands/getset
         * @example
         * <pre>
         * $redisCluster->set('x', '42');
         * $exValue = $redisCluster->getSet('x', 'lol');   // return '42', replaces x by 'lol'
         * $newValue = $redisCluster->get('x');            // return 'lol'
         * </pre>
         */
        public function getSet($key, $value) { }
    
        /**
         * Verify if the specified key exists.
         *
         * @param   string $key
         *
         * @return  bool: If the key exists, return TRUE, otherwise return FALSE.
         * @link    http://redis.io/commands/exists
         * @example
         * <pre>
         * $redisCluster->set('key', 'value');
         * $redisCluster->exists('key');               //  TRUE
         * $redisCluster->exists('NonExistingKey');    // FALSE
         * </pre>
         */
        public function exists($key) { }
    
        /**
         * Returns the keys that match a certain pattern.
         *
         * @param   string $pattern pattern, using '*' as a wildcard.
         *
         * @return  array   of STRING: The keys that match a certain pattern.
         * @link    http://redis.io/commands/keys
         * @example
         * <pre>
         * $allKeys = $redisCluster->keys('*');   // all keys will match this.
         * $keyWithUserPrefix = $redisCluster->keys('user*');
         * </pre>
         */
        public function keys($pattern) { }
    
        /**
         * Returns the type of data pointed by a given key.
         *
         * @param   string $key
         *
         * @return  int
         *
         * Depending on the type of the data pointed by the key,
         * this method will return the following value:
         * - string: RedisCluster::REDIS_STRING
         * - set:   RedisCluster::REDIS_SET
         * - list:  RedisCluster::REDIS_LIST
         * - zset:  RedisCluster::REDIS_ZSET
         * - hash:  RedisCluster::REDIS_HASH
         * - other: RedisCluster::REDIS_NOT_FOUND
         * @link    http://redis.io/commands/type
         * @example $redisCluster->type('key');
         */
        public function type($key) { }
    
        /**
         * Returns and removes the first element of the list.
         *
         * @param   string $key
         *
         * @return  string if command executed successfully BOOL FALSE in case of failure (empty list)
         * @link    http://redis.io/commands/lpop
         * @example
         * <pre>
         * $redisCluster->rPush('key1', 'A');
         * $redisCluster->rPush('key1', 'B');
         * $redisCluster->rPush('key1', 'C');
         * var_dump( $redisCluster->lRange('key1', 0, -1) );
         * // Output:
         * // array(3) {
         * //   [0]=> string(1) "A"
         * //   [1]=> string(1) "B"
         * //   [2]=> string(1) "C"
         * // }
         * $redisCluster->lPop('key1');
         * var_dump( $redisCluster->lRange('key1', 0, -1) );
         * // Output:
         * // array(2) {
         * //   [0]=> string(1) "B"
         * //   [1]=> string(1) "C"
         * // }
         * </pre>
         */
        public function lPop($key) { }
    
        /**
         * Returns and removes the last element of the list.
         *
         * @param   string $key
         *
         * @return  string if command executed successfully BOOL FALSE in case of failure (empty list)
         * @link    http://redis.io/commands/rpop
         * @example
         * <pre>
         * $redisCluster->rPush('key1', 'A');
         * $redisCluster->rPush('key1', 'B');
         * $redisCluster->rPush('key1', 'C');
         * var_dump( $redisCluster->lRange('key1', 0, -1) );
         * // Output:
         * // array(3) {
         * //   [0]=> string(1) "A"
         * //   [1]=> string(1) "B"
         * //   [2]=> string(1) "C"
         * // }
         * $redisCluster->rPop('key1');
         * var_dump( $redisCluster->lRange('key1', 0, -1) );
         * // Output:
         * // array(2) {
         * //   [0]=> string(1) "A"
         * //   [1]=> string(1) "B"
         * // }
         * </pre>
         */
        public function rPop($key) { }
    
        /**
         * Set the list at index with the new value.
         *
         * @param string $key
         * @param int    $index
         * @param string $value
         *
         * @return BOOL TRUE if the new value is setted. FALSE if the index is out of range, or data type identified by key
         * is not a list.
         * @link    http://redis.io/commands/lset
         * @example
         * <pre>
         * $redisCluster->rPush('key1', 'A');
         * $redisCluster->rPush('key1', 'B');
         * $redisCluster->rPush('key1', 'C');  // key1 => [ 'A', 'B', 'C' ]
         * $redisCluster->lGet('key1', 0);     // 'A'
         * $redisCluster->lSet('key1', 0, 'X');
         * $redisCluster->lGet('key1', 0);     // 'X'
         * </pre>
         */
        public function lSet($key, $index, $value) { }
    
        /**
         * Removes and returns a random element from the set value at Key.
         *
         * @param   string $key
         *
         * @return  string  "popped" value
         * bool FALSE if set identified by key is empty or doesn't exist.
         * @link    http://redis.io/commands/spop
         * @example
         * <pre>
         * $redisCluster->sAdd('key1' , 'set1');
         * $redisCluster->sAdd('key1' , 'set2');
         * $redisCluster->sAdd('key1' , 'set3');
         * var_dump($redisCluster->sMembers('key1'));// 'key1' => {'set3', 'set1', 'set2'}
         * $redisCluster->sPop('key1');// 'set1'
         * var_dump($redisCluster->sMembers('key1'));// 'key1' => {'set3', 'set2'}
         * $redisCluster->sPop('key1');// 'set3',
         * var_dump($redisCluster->sMembers('key1'));// 'key1' => {'set2'}
         * </pre>
         */
        public function sPop($key) { }
    
        /**
         * Adds the string values to the head (left) of the list. Creates the list if the key didn't exist.
         * If the key exists and is not a list, FALSE is returned.
         *
         * @param   string $key
         * @param   string $value1 String, value to push in key
         * @param   string $value2 Optional
         * @param   string $valueN Optional
         *
         * @return  int    The new length of the list in case of success, FALSE in case of Failure.
         * @link    http://redis.io/commands/lpush
         * @example
         * <pre>
         * $redisCluster->lPush('l', 'v1', 'v2', 'v3', 'v4')   // int(4)
         * var_dump( $redisCluster->lRange('l', 0, -1) );
         *  Output:
         * // array(4) {
         * //   [0]=> string(2) "v4"
         * //   [1]=> string(2) "v3"
         * //   [2]=> string(2) "v2"
         * //   [3]=> string(2) "v1"
         * // }
         * </pre>
         */
        public function lPush($key, $value1, $value2 = null, $valueN = null) { }
    
        /**
         * Adds the string values to the tail (right) of the list. Creates the list if the key didn't exist.
         * If the key exists and is not a list, FALSE is returned.
         *
         * @param   string $key
         * @param   string $value1 String, value to push in key
         * @param   string $value2 Optional
         * @param   string $valueN Optional
         *
         * @return  int     The new length of the list in case of success, FALSE in case of Failure.
         * @link    http://redis.io/commands/rpush
         * @example
         * <pre>
         * $redisCluster->rPush('r', 'v1', 'v2', 'v3', 'v4');    // int(4)
         * var_dump( $redisCluster->lRange('r', 0, -1) );
         *  Output:
         * // array(4) {
         * //   [0]=> string(2) "v1"
         * //   [1]=> string(2) "v2"
         * //   [2]=> string(2) "v3"
         * //   [3]=> string(2) "v4"
         * // }
         * </pre>
         */
        public function rPush($key, $value1, $value2 = null, $valueN = null) { }
    
        /**
         * BLPOP is a blocking list pop primitive.
         * It is the blocking version of LPOP because it blocks the connection when
         * there are no elements to pop from any of the given lists.
         * An element is popped from the head of the first list that is non-empty,
         * with the given keys being checked in the order that they are given.
         *
         * @param array $keys    Array containing the keys of the lists
         *                       Or STRING Key1 STRING Key2 STRING Key3 ... STRING Keyn
         * @param int   $timeout Timeout
         *
         * @return  array array('listName', 'element')
         * @link    http://redis.io/commands/blpop
         * @example
         * <pre>
         * // Non blocking feature
         * $redisCluster->lPush('key1', 'A');
         * $redisCluster->del('key2');
         *
         * $redisCluster->blPop('key1', 'key2', 10); // array('key1', 'A')
         * // OR
         * $redisCluster->blPop(array('key1', 'key2'), 10); // array('key1', 'A')
         *
         * $redisCluster->brPop('key1', 'key2', 10); // array('key1', 'A')
         * // OR
         * $redisCluster->brPop(array('key1', 'key2'), 10); // array('key1', 'A')
         *
         * // Blocking feature
         *
         * // process 1
         * $redisCluster->del('key1');
         * $redisCluster->blPop('key1', 10);
         * // blocking for 10 seconds
         *
         * // process 2
         * $redisCluster->lPush('key1', 'A');
         *
         * // process 1
         * // array('key1', 'A') is returned
         * </pre>
         */
        public function blPop(array $keys, $timeout) { }
    
        /**
         * BRPOP is a blocking list pop primitive.
         * It is the blocking version of RPOP because it blocks the connection when
         * there are no elements to pop from any of the given lists.
         * An element is popped from the tail of the first list that is non-empty,
         * with the given keys being checked in the order that they are given.
         * See the BLPOP documentation(http://redis.io/commands/blpop) for the exact semantics,
         * since BRPOP is identical to BLPOP with the only difference being that
         * it pops elements from the tail of a list instead of popping from the head.
         *
         * @param array $keys    Array containing the keys of the lists
         *                       Or STRING Key1 STRING Key2 STRING Key3 ... STRING Keyn
         * @param int   $timeout Timeout
         *
         * @return  array array('listName', 'element')
         * @link    http://redis.io/commands/brpop
         * @example
         * <pre>
         * // Non blocking feature
         * $redisCluster->lPush('key1', 'A');
         * $redisCluster->del('key2');
         *
         * $redisCluster->blPop('key1', 'key2', 10); // array('key1', 'A')
         * // OR
         * $redisCluster->blPop(array('key1', 'key2'), 10); // array('key1', 'A')
         *
         * $redisCluster->brPop('key1', 'key2', 10); // array('key1', 'A')
         * // OR
         * $redisCluster->brPop(array('key1', 'key2'), 10); // array('key1', 'A')
         *
         * // Blocking feature
         *
         * // process 1
         * $redisCluster->del('key1');
         * $redisCluster->blPop('key1', 10);
         * // blocking for 10 seconds
         *
         * // process 2
         * $redisCluster->lPush('key1', 'A');
         *
         * // process 1
         * // array('key1', 'A') is returned
         * </pre>
         */
        public function brPop(array $keys, $timeout) { }
    
        /**
         * Adds the string value to the tail (right) of the list if the ist exists. FALSE in case of Failure.
         *
         * @param   string $key
         * @param   string $value String, value to push in key
         *
         * @return  int     The new length of the list in case of success, FALSE in case of Failure.
         * @link    http://redis.io/commands/rpushx
         * @example
         * <pre>
         * $redisCluster->del('key1');
         * $redisCluster->rPushx('key1', 'A'); // returns 0
         * $redisCluster->rPush('key1', 'A'); // returns 1
         * $redisCluster->rPushx('key1', 'B'); // returns 2
         * $redisCluster->rPushx('key1', 'C'); // returns 3
         * // key1 now points to the following list: [ 'A', 'B', 'C' ]
         * </pre>
         */
        public function rPushx($key, $value) { }
    
        /**
         * Adds the string value to the head (left) of the list if the list exists.
         *
         * @param   string $key
         * @param   string $value String, value to push in key
         *
         * @return  int     The new length of the list in case of success, FALSE in case of Failure.
         * @link    http://redis.io/commands/lpushx
         * @example
         * <pre>
         * $redisCluster->del('key1');
         * $redisCluster->lPushx('key1', 'A');     // returns 0
         * $redisCluster->lPush('key1', 'A');      // returns 1
         * $redisCluster->lPushx('key1', 'B');     // returns 2
         * $redisCluster->lPushx('key1', 'C');     // returns 3
         * // key1 now points to the following list: [ 'C', 'B', 'A' ]
         * </pre>
         */
        public function lPushx($key, $value) { }
    
        /**
         * Insert value in the list before or after the pivot value. the parameter options
         * specify the position of the insert (before or after). If the list didn't exists,
         * or the pivot didn't exists, the value is not inserted.
         *
         * @param   string $key
         * @param   int    $position RedisCluster::BEFORE | RedisCluster::AFTER
         * @param   string $pivot
         * @param   string $value
         *
         * @return  int     The number of the elements in the list, -1 if the pivot didn't exists.
         * @link    http://redis.io/commands/linsert
         * @example
         * <pre>
         * $redisCluster->del('key1');
         * $redisCluster->lInsert('key1', RedisCluster::AFTER, 'A', 'X');    // 0
         *
         * $redisCluster->lPush('key1', 'A');
         * $redisCluster->lPush('key1', 'B');
         * $redisCluster->lPush('key1', 'C');
         *
         * $redisCluster->lInsert('key1', RedisCluster::BEFORE, 'C', 'X');   // 4
         * $redisCluster->lRange('key1', 0, -1);                      // array('X', 'C', 'B', 'A')
         *
         * $redisCluster->lInsert('key1', RedisCluster::AFTER, 'C', 'Y');    // 5
         * $redisCluster->lRange('key1', 0, -1);                      // array('X', 'C', 'Y', 'B', 'A')
         *
         * $redisCluster->lInsert('key1', RedisCluster::AFTER, 'W', 'value'); // -1
         * </pre>
         */
        public function lInsert($key, $position, $pivot, $value) { }
    
        /**
         * Return the specified element of the list stored at the specified key.
         * 0 the first element, 1 the second ... -1 the last element, -2 the penultimate ...
         * Return FALSE in case of a bad index or a key that doesn't point to a list.
         *
         * @param string $key
         * @param int    $index
         *
         * @return String the element at this index
         * Bool FALSE if the key identifies a non-string data type, or no value corresponds to this index in the list Key.
         * @link    http://redis.io/commands/lindex
         * @example
         * <pre>
         * $redisCluster->rPush('key1', 'A');
         * $redisCluster->rPush('key1', 'B');
         * $redisCluster->rPush('key1', 'C');  // key1 => [ 'A', 'B', 'C' ]
         * $redisCluster->lGet('key1', 0);     // 'A'
         * $redisCluster->lGet('key1', -1);    // 'C'
         * $redisCluster->lGet('key1', 10);    // `FALSE`
         * </pre>
         */
        public function lIndex($key, $index) { }
    
        /**
         * Removes the first count occurences of the value element from the list.
         * If count is zero, all the matching elements are removed. If count is negative,
         * elements are removed from tail to head.
         *
         * @param   string $key
         * @param   string $value
         * @param   int    $count
         *
         * @return  int     the number of elements to remove
         * bool FALSE if the value identified by key is not a list.
         * @link    http://redis.io/commands/lrem
         * @example
         * <pre>
         * $redisCluster->lPush('key1', 'A');
         * $redisCluster->lPush('key1', 'B');
         * $redisCluster->lPush('key1', 'C');
         * $redisCluster->lPush('key1', 'A');
         * $redisCluster->lPush('key1', 'A');
         *
         * $redisCluster->lRange('key1', 0, -1);   // array('A', 'A', 'C', 'B', 'A')
         * $redisCluster->lRem('key1', 'A', 2);    // 2
         * $redisCluster->lRange('key1', 0, -1);   // array('C', 'B', 'A')
         * </pre>
         */
        public function lRem($key, $value, $count) { }
    
        /**
         * A blocking version of rpoplpush, with an integral timeout in the third parameter.
         *
         * @param   string $srcKey
         * @param   string $dstKey
         * @param   int    $timeout
         *
         * @return  string  The element that was moved in case of success, FALSE in case of timeout.
         * @link    http://redis.io/commands/brpoplpush
         */
        public function brpoplpush($srcKey, $dstKey, $timeout) { }
    
        /**
         * Pops a value from the tail of a list, and pushes it to the front of another list.
         * Also return this value.
         *
         * @since   redis >= 1.2
         *
         * @param   string $srcKey
         * @param   string $dstKey
         *
         * @return  string  The element that was moved in case of success, FALSE in case of failure.
         * @link    http://redis.io/commands/rpoplpush
         * @example
         * <pre>
         * $redisCluster->del('x', 'y');
         *
         * $redisCluster->lPush('x', 'abc');
         * $redisCluster->lPush('x', 'def');
         * $redisCluster->lPush('y', '123');
         * $redisCluster->lPush('y', '456');
         *
         * // move the last of x to the front of y.
         * var_dump($redisCluster->rpoplpush('x', 'y'));
         * var_dump($redisCluster->lRange('x', 0, -1));
         * var_dump($redisCluster->lRange('y', 0, -1));
         *
         * Output:
         * //
         * //string(3) "abc"
         * //array(1) {
         * //  [0]=>
         * //  string(3) "def"
         * //}
         * //array(3) {
         * //  [0]=>
         * //  string(3) "abc"
         * //  [1]=>
         * //  string(3) "456"
         * //  [2]=>
         * //  string(3) "123"
         * //}
         * </pre>
         */
        public function rpoplpush($srcKey, $dstKey) { }
    
        /**
         * Returns the size of a list identified by Key. If the list didn't exist or is empty,
         * the command returns 0. If the data type identified by Key is not a list, the command return FALSE.
         *
         * @param   string $key
         *
         * @return  int     The size of the list identified by Key exists.
         * bool FALSE if the data type identified by Key is not list
         * @link    http://redis.io/commands/llen
         * @example
         * <pre>
         * $redisCluster->rPush('key1', 'A');
         * $redisCluster->rPush('key1', 'B');
         * $redisCluster->rPush('key1', 'C');  // key1 => [ 'A', 'B', 'C' ]
         * $redisCluster->lLen('key1');       // 3
         * $redisCluster->rPop('key1');
         * $redisCluster->lLen('key1');       // 2
         * </pre>
         */
        public function lLen($key) { }
    
        /**
         * Returns the set cardinality (number of elements) of the set stored at key.
         *
         * @param   string $key
         *
         * @return  int   the cardinality (number of elements) of the set, or 0 if key does not exist.
         * @link    http://redis.io/commands/scard
         * @example
         * <pre>
         * $redisCluster->sAdd('key1' , 'set1');
         * $redisCluster->sAdd('key1' , 'set2');
         * $redisCluster->sAdd('key1' , 'set3');   // 'key1' => {'set1', 'set2', 'set3'}
         * $redisCluster->sCard('key1');           // 3
         * $redisCluster->sCard('keyX');           // 0
         * </pre>
         */
        public function sCard($key) { }
    
        /**
         * Returns all the members of the set value stored at key.
         * This has the same effect as running SINTER with one argument key.
         *
         * @param   string $key
         *
         * @return  array   All elements of the set.
         * @link    http://redis.io/commands/smembers
         * @example
         * <pre>
         * $redisCluster->del('s');
         * $redisCluster->sAdd('s', 'a');
         * $redisCluster->sAdd('s', 'b');
         * $redisCluster->sAdd('s', 'a');
         * $redisCluster->sAdd('s', 'c');
         * var_dump($redisCluster->sMembers('s'));
         *
         * Output:
         * //
         * //array(3) {
         * //  [0]=>
         * //  string(1) "b"
         * //  [1]=>
         * //  string(1) "c"
         * //  [2]=>
         * //  string(1) "a"
         * //}
         * // The order is random and corresponds to redis' own internal representation of the set structure.
         * </pre>
         */
        public function sMembers($key) { }
    
        /**
         * Returns if member is a member of the set stored at key.
         *
         * @param   string $key
         * @param   string $value
         *
         * @return  bool    TRUE if value is a member of the set at key key, FALSE otherwise.
         * @link    http://redis.io/commands/sismember
         * @example
         * <pre>
         * $redisCluster->sAdd('key1' , 'set1');
         * $redisCluster->sAdd('key1' , 'set2');
         * $redisCluster->sAdd('key1' , 'set3'); // 'key1' => {'set1', 'set2', 'set3'}
         *
         * $redisCluster->sIsMember('key1', 'set1'); // TRUE
         * $redisCluster->sIsMember('key1', 'setX'); // FALSE
         * </pre>
         */
        public function sIsMember($key, $value) { }
    
        /**
         * Adds a values to the set value stored at key.
         * If this value is already in the set, FALSE is returned.
         *
         * @param   string $key    Required key
         * @param   string $value1 Required value
         * @param   string $value2 Optional value
         * @param   string $valueN Optional value
         *
         * @return  int     The number of elements added to the set
         * @link    http://redis.io/commands/sadd
         * @example
         * <pre>
         * $redisCluster->sAdd('k', 'v1');                // int(1)
         * $redisCluster->sAdd('k', 'v1', 'v2', 'v3');    // int(2)
         * </pre>
         */
        public function sAdd($key, $value1, $value2 = null, $valueN = null) { }
    
        /**
         * Adds a values to the set value stored at key.
         * If this value is already in the set, FALSE is returned.
         *
         * @param   string $key Required key
         * @param   array  $valueArray
         *
         * @return  int     The number of elements added to the set
         * @example
         * <pre>
         * $redisCluster->sAddArray('k', ['v1', 'v2', 'v3']);
         * //This is a feature in php only. Same as $redisCluster->sAdd('k', 'v1', 'v2', 'v3');
         * </pre>
         */
        public function sAddArray($key, array $valueArray) { }
    
        /**
         * Removes the specified members from the set value stored at key.
         *
         * @param   string $key
         * @param   string $member1
         * @param   string $member2
         * @param   string $memberN
         *
         * @return  int     The number of elements removed from the set.
         * @link    http://redis.io/commands/srem
         * @example
         * <pre>
         * var_dump( $redisCluster->sAdd('k', 'v1', 'v2', 'v3') );    // int(3)
         * var_dump( $redisCluster->sRem('k', 'v2', 'v3') );          // int(2)
         * var_dump( $redisCluster->sMembers('k') );
         *  Output:
         * // array(1) {
         * //   [0]=> string(2) "v1"
         * // }
         * </pre>
         */
        public function sRem($key, $member1, $member2 = null, $memberN = null) { }
    
        /**
         * Performs the union between N sets and returns it.
         *
         * @param   string $key1 Any number of keys corresponding to sets in redis.
         * @param   string $key2 ...
         * @param   string $keyN ...
         *
         * @return  array   of strings: The union of all these sets.
         * @link    http://redis.io/commands/sunionstore
         * @example
         * <pre>
         * $redisCluster->del('s0', 's1', 's2');
         *
         * $redisCluster->sAdd('s0', '1');
         * $redisCluster->sAdd('s0', '2');
         * $redisCluster->sAdd('s1', '3');
         * $redisCluster->sAdd('s1', '1');
         * $redisCluster->sAdd('s2', '3');
         * $redisCluster->sAdd('s2', '4');
         *
         * var_dump($redisCluster->sUnion('s0', 's1', 's2'));
         *
         *  Output:
         * //
         * //array(4) {
         * //  [0]=>
         * //  string(1) "3"
         * //  [1]=>
         * //  string(1) "4"
         * //  [2]=>
         * //  string(1) "1"
         * //  [3]=>
         * //  string(1) "2"
         * //}
         * </pre>
         */
        public function sUnion($key1, $key2, $keyN = null) { }
    
        /**
         * Performs the same action as sUnion, but stores the result in the first key
         *
         * @param   string $dstKey the key to store the diff into.
         * @param   string $key1   Any number of keys corresponding to sets in redis.
         * @param   string $key2   ...
         * @param   string $keyN   ...
         *
         * @return  int     Any number of keys corresponding to sets in redis.
         * @link    http://redis.io/commands/sunionstore
         * @example
         * <pre>
         * $redisCluster->del('s0', 's1', 's2');
         *
         * $redisCluster->sAdd('s0', '1');
         * $redisCluster->sAdd('s0', '2');
         * $redisCluster->sAdd('s1', '3');
         * $redisCluster->sAdd('s1', '1');
         * $redisCluster->sAdd('s2', '3');
         * $redisCluster->sAdd('s2', '4');
         *
         * var_dump($redisCluster->sUnionStore('dst', 's0', 's1', 's2'));
         * var_dump($redisCluster->sMembers('dst'));
         *
         *  Output:
         * //
         * //int(4)
         * //array(4) {
         * //  [0]=>
         * //  string(1) "3"
         * //  [1]=>
         * //  string(1) "4"
         * //  [2]=>
         * //  string(1) "1"
         * //  [3]=>
         * //  string(1) "2"
         * //}
         * </pre>
         */
        public function sUnionStore($dstKey, $key1, $key2, $keyN = null) { }
    
        /**
         * Returns the members of a set resulting from the intersection of all the sets
         * held at the specified keys. If just a single key is specified, then this command
         * produces the members of this set. If one of the keys is missing, FALSE is returned.
         *
         * @param   string $key1 keys identifying the different sets on which we will apply the intersection.
         * @param   string $key2 ...
         * @param   string $keyN ...
         *
         * @return  array, contain the result of the intersection between those keys.
         * If the intersection between the different sets is empty, the return value will be empty array.
         * @link    http://redis.io/commands/sinterstore
         * @example
         * <pre>
         * $redisCluster->sAdd('key1', 'val1');
         * $redisCluster->sAdd('key1', 'val2');
         * $redisCluster->sAdd('key1', 'val3');
         * $redisCluster->sAdd('key1', 'val4');
         *
         * $redisCluster->sAdd('key2', 'val3');
         * $redisCluster->sAdd('key2', 'val4');
         *
         * $redisCluster->sAdd('key3', 'val3');
         * $redisCluster->sAdd('key3', 'val4');
         *
         * var_dump($redisCluster->sInter('key1', 'key2', 'key3'));
         *
         * // Output:
         * //
         * //array(2) {
         * //  [0]=>
         * //  string(4) "val4"
         * //  [1]=>
         * //  string(4) "val3"
         * //}
         * </pre>
         */
        public function sInter($key1, $key2, $keyN = null) { }
    
        /**
         * Performs a sInter command and stores the result in a new set.
         *
         * @param   string $dstKey the key to store the diff into.
         * @param   string $key1   are intersected as in sInter.
         * @param   string $key2   ...
         * @param   string $keyN   ...
         *
         * @return  int:    The cardinality of the resulting set, or FALSE in case of a missing key.
         * @link    http://redis.io/commands/sinterstore
         * @example
         * <pre>
         * $redisCluster->sAdd('key1', 'val1');
         * $redisCluster->sAdd('key1', 'val2');
         * $redisCluster->sAdd('key1', 'val3');
         * $redisCluster->sAdd('key1', 'val4');
         *
         * $redisCluster->sAdd('key2', 'val3');
         * $redisCluster->sAdd('key2', 'val4');
         *
         * $redisCluster->sAdd('key3', 'val3');
         * $redisCluster->sAdd('key3', 'val4');
         *
         * var_dump($redisCluster->sInterStore('output', 'key1', 'key2', 'key3'));
         * var_dump($redisCluster->sMembers('output'));
         *
         *  Output:
         * //
         * //int(2)
         * //array(2) {
         * //  [0]=>
         * //  string(4) "val4"
         * //  [1]=>
         * //  string(4) "val3"
         * //}
         * </pre>
         */
        public function sInterStore($dstKey, $key1, $key2, $keyN = null) { }
    
        /**
         * Performs the difference between N sets and returns it.
         *
         * @param   string $key1 Any number of keys corresponding to sets in redis.
         * @param   string $key2 ...
         * @param   string $keyN ...
         *
         * @return  array   of strings: The difference of the first set will all the others.
         * @link    http://redis.io/commands/sdiff
         * @example
         * <pre>
         * $redisCluster->del('s0', 's1', 's2');
         *
         * $redisCluster->sAdd('s0', '1');
         * $redisCluster->sAdd('s0', '2');
         * $redisCluster->sAdd('s0', '3');
         * $redisCluster->sAdd('s0', '4');
         *
         * $redisCluster->sAdd('s1', '1');
         * $redisCluster->sAdd('s2', '3');
         *
         * var_dump($redisCluster->sDiff('s0', 's1', 's2'));
         *
         *  Output:
         * //
         * //array(2) {
         * //  [0]=>
         * //  string(1) "4"
         * //  [1]=>
         * //  string(1) "2"
         * //}
         * </pre>
         */
        public function sDiff($key1, $key2, $keyN = null) { }
    
        /**
         * Performs the same action as sDiff, but stores the result in the first key
         *
         * @param   string $dstKey the key to store the diff into.
         * @param   string $key1   Any number of keys corresponding to sets in redis
         * @param   string $key2   ...
         * @param   string $keyN   ...
         *
         * @return  int:    The cardinality of the resulting set, or FALSE in case of a missing key.
         * @link    http://redis.io/commands/sdiffstore
         * @example
         * <pre>
         * $redisCluster->del('s0', 's1', 's2');
         *
         * $redisCluster->sAdd('s0', '1');
         * $redisCluster->sAdd('s0', '2');
         * $redisCluster->sAdd('s0', '3');
         * $redisCluster->sAdd('s0', '4');
         *
         * $redisCluster->sAdd('s1', '1');
         * $redisCluster->sAdd('s2', '3');
         *
         * var_dump($redisCluster->sDiffStore('dst', 's0', 's1', 's2'));
         * var_dump($redisCluster->sMembers('dst'));
         *
         *  Output:
         * //
         * //int(2)
         * //array(2) {
         * //  [0]=>
         * //  string(1) "4"
         * //  [1]=>
         * //  string(1) "2"
         * //}
         * </pre>
         */
        public function sDiffStore($dstKey, $key1, $key2, $keyN = null) { }
    
        /**
         * Returns a random element(s) from the set value at Key, without removing it.
         *
         * @param   string $key
         * @param   int    $count [optional]
         *
         * @return  string|array  value(s) from the set
         * bool FALSE if set identified by key is empty or doesn't exist and count argument isn't passed.
         * @link    http://redis.io/commands/srandmember
         * @example
         * <pre>
         * $redisCluster->sAdd('key1' , 'one');
         * $redisCluster->sAdd('key1' , 'two');
         * $redisCluster->sAdd('key1' , 'three');              // 'key1' => {'one', 'two', 'three'}
         *
         * var_dump( $redisCluster->sRandMember('key1') );     // 'key1' => {'one', 'two', 'three'}
         *
         * // string(5) "three"
         *
         * var_dump( $redisCluster->sRandMember('key1', 2) );  // 'key1' => {'one', 'two', 'three'}
         *
         * // array(2) {
         * //   [0]=> string(2) "one"
         * //   [1]=> string(2) "three"
         * // }
         * </pre>
         */
        public function sRandMember($key, $count = null) { }
    
        /**
         * Get the length of a string value.
         *
         * @param   string $key
         *
         * @return  int
         * @link    http://redis.io/commands/strlen
         * @example
         * <pre>
         * $redisCluster->set('key', 'value');
         * $redisCluster->strlen('key'); // 5
         * </pre>
         */
        public function strlen($key) { }
    
        /**
         * Remove the expiration timer from a key.
         *
         * @param   string $key
         *
         * @return  bool:   TRUE if a timeout was removed, FALSE if the key didn’t exist or didn’t have an expiration timer.
         * @link    http://redis.io/commands/persist
         * @example $redisCluster->persist('key');
         */
        public function persist($key) { }
    
        /**
         * Returns the remaining time to live of a key that has a timeout.
         * This introspection capability allows a Redis client to check how many seconds a given key will continue to be
         * part of the dataset. In Redis 2.6 or older the command returns -1 if the key does not exist or if the key exist
         * but has no associated expire. Starting with Redis 2.8 the return value in case of error changed: Returns -2 if
         * the key does not exist. Returns -1 if the key exists but has no associated expire.
         *
         * @param   string $key
         *
         * @return  int,    the time left to live in seconds.
         * @link    http://redis.io/commands/ttl
         * @example $redisCluster->ttl('key');
         */
        public function ttl($key) { }
    
        /**
         * Returns the remaining time to live of a key that has an expire set,
         * with the sole difference that TTL returns the amount of remaining time in seconds while PTTL returns it in
         * milliseconds. In Redis 2.6 or older the command returns -1 if the key does not exist or if the key exist but has
         * no associated expire. Starting with Redis 2.8 the return value in case of error changed: Returns -2 if the key
         * does not exist. Returns -1 if the key exists but has no associated expire.
         *
         * @param   string $key
         *
         * @return  int     the time left to live in milliseconds.
         * @link    http://redis.io/commands/pttl
         * @example $redisCluster->pttl('key');
         */
        public function pttl($key) { }
    
        /**
         * Returns the cardinality of an ordered set.
         *
         * @param   string $key
         *
         * @return  int     the set's cardinality
         * @link    http://redis.io/commands/zsize
         * @example
         * <pre>
         * $redisCluster->zAdd('key', 0, 'val0');
         * $redisCluster->zAdd('key', 2, 'val2');
         * $redisCluster->zAdd('key', 10, 'val10');
         * $redisCluster->zCard('key');            // 3
         * </pre>
         */
        public function zCard($key) { }
    
        /**
         * Returns the number of elements of the sorted set stored at the specified key which have
         * scores in the range [start,end]. Adding a parenthesis before start or end excludes it
         * from the range. +inf and -inf are also valid limits.
         *
         * @param   string $key
         * @param   string $start
         * @param   string $end
         *
         * @return  int     the size of a corresponding zRangeByScore.
         * @link    http://redis.io/commands/zcount
         * @example
         * <pre>
         * $redisCluster->zAdd('key', 0, 'val0');
         * $redisCluster->zAdd('key', 2, 'val2');
         * $redisCluster->zAdd('key', 10, 'val10');
         * $redisCluster->zCount('key', 0, 3); // 2, corresponding to array('val0', 'val2')
         * </pre>
         */
        public function zCount($key, $start, $end) { }
    
        /**
         * Deletes the elements of the sorted set stored at the specified key which have scores in the range [start,end].
         *
         * @param   string       $key
         * @param   float|string $start double or "+inf" or "-inf" string
         * @param   float|string $end   double or "+inf" or "-inf" string
         *
         * @return  int             The number of values deleted from the sorted set
         * @link    http://redis.io/commands/zremrangebyscore
         * @example
         * <pre>
         * $redisCluster->zAdd('key', 0, 'val0');
         * $redisCluster->zAdd('key', 2, 'val2');
         * $redisCluster->zAdd('key', 10, 'val10');
         * $redisCluster->zRemRangeByScore('key', 0, 3); // 2
         * </pre>
         */
        public function zRemRangeByScore($key, $start, $end) { }
    
        /**
         * Returns the score of a given member in the specified sorted set.
         *
         * @param   string $key
         * @param   string $member
         *
         * @return  float
         * @link    http://redis.io/commands/zscore
         * @example
         * <pre>
         * $redisCluster->zAdd('key', 2.5, 'val2');
         * $redisCluster->zScore('key', 'val2'); // 2.5
         * </pre>
         */
        public function zScore($key, $member) { }
    
        /**
         * Adds the specified member with a given score to the sorted set stored at key.
         *
         * @param   string $key    Required key
         * @param   float  $score1 Required score
         * @param   string $value1 Required value
         * @param   float  $score2 Optional score
         * @param   string $value2 Optional value
         * @param   float  $scoreN Optional score
         * @param   string $valueN Optional value
         *
         * @return  int     Number of values added
         * @link    http://redis.io/commands/zadd
         * @example
         * <pre>
         * $redisCluster->zAdd('z', 1, 'v2', 2, 'v2', 3, 'v3', 4, 'v4' );  // int(3)
         * $redisCluster->zRem('z', 'v2', 'v3');                           // int(2)
         * var_dump( $redisCluster->zRange('z', 0, -1) );
         *
         *  Output:
         * // array(1) {
         * //   [0]=> string(2) "v4"
         * // }
         * </pre>
         */
        public function zAdd($key, $score1, $value1, $score2 = null, $value2 = null, $scoreN = null, $valueN = null) { }
    
        /**
         * Increments the score of a member from a sorted set by a given amount.
         *
         * @param   string $key
         * @param   float  $value (double) value that will be added to the member's score
         * @param   string $member
         *
         * @return  float   the new value
         * @link    http://redis.io/commands/zincrby
         * @example
         * <pre>
         * $redisCluster->del('key');
         * $redisCluster->zIncrBy('key', 2.5, 'member1');// key or member1 didn't exist, so member1's score is to 0 ;
         *                                              //before the increment and now has the value 2.5
         * $redisCluster->zIncrBy('key', 1, 'member1');    // 3.5
         * </pre>
         */
        public function zIncrBy($key, $value, $member) { }
    
        /**
         * Returns the length of a hash, in number of items
         *
         * @param   string $key
         *
         * @return  int     the number of items in a hash, FALSE if the key doesn't exist or isn't a hash.
         * @link    http://redis.io/commands/hlen
         * @example
         * <pre>
         * $redisCluster->del('h');
         * $redisCluster->hSet('h', 'key1', 'hello');
         * $redisCluster->hSet('h', 'key2', 'plop');
         * $redisCluster->hLen('h'); // returns 2
         * </pre>
         */
        public function hLen($key) { }
    
        /**
         * Returns the keys in a hash, as an array of strings.
         *
         * @param   string $key
         *
         * @return  array   An array of elements, the keys of the hash. This works like PHP's array_keys().
         * @link    http://redis.io/commands/hkeys
         * @example
         * <pre>
         * $redisCluster->del('h');
         * $redisCluster->hSet('h', 'a', 'x');
         * $redisCluster->hSet('h', 'b', 'y');
         * $redisCluster->hSet('h', 'c', 'z');
         * $redisCluster->hSet('h', 'd', 't');
         * var_dump($redisCluster->hKeys('h'));
         *
         *  Output:
         * //
         * // array(4) {
         * // [0]=>
         * // string(1) "a"
         * // [1]=>
         * // string(1) "b"
         * // [2]=>
         * // string(1) "c"
         * // [3]=>
         * // string(1) "d"
         * // }
         * // The order is random and corresponds to redis' own internal representation of the set structure.
         * </pre>
         */
        public function hKeys($key) { }
    
        /**
         * Returns the values in a hash, as an array of strings.
         *
         * @param   string $key
         *
         * @return  array   An array of elements, the values of the hash. This works like PHP's array_values().
         * @link    http://redis.io/commands/hvals
         * @example
         * <pre>
         * $redisCluster->del('h');
         * $redisCluster->hSet('h', 'a', 'x');
         * $redisCluster->hSet('h', 'b', 'y');
         * $redisCluster->hSet('h', 'c', 'z');
         * $redisCluster->hSet('h', 'd', 't');
         * var_dump($redisCluster->hVals('h'));
         *
         *  Output:
         * //
         * // array(4) {
         * //   [0]=>
         * //   string(1) "x"
         * //   [1]=>
         * //   string(1) "y"
         * //   [2]=>
         * //   string(1) "z"
         * //   [3]=>
         * //   string(1) "t"
         * // }
         * // The order is random and corresponds to redis' own internal representation of the set structure.
         * </pre>
         */
        public function hVals($key) { }
    
        /**
         * Gets a value from the hash stored at key.
         * If the hash table doesn't exist, or the key doesn't exist, FALSE is returned.
         *
         * @param   string $key
         * @param   string $hashKey
         *
         * @return  string  The value, if the command executed successfully BOOL FALSE in case of failure
         * @link    http://redis.io/commands/hget
         * @example
         * <pre>
         * $redisCluster->del('h');
         * $redisCluster->hSet('h', 'a', 'x');
         * $redisCluster->hGet('h', 'a'); // 'X'
         * </pre>
         */
        public function hGet($key, $hashKey) { }
    
        /**
         * Returns the whole hash, as an array of strings indexed by strings.
         *
         * @param   string $key
         *
         * @return  array   An array of elements, the contents of the hash.
         * @link    http://redis.io/commands/hgetall
         * @example
         * <pre>
         * $redisCluster->del('h');
         * $redisCluster->hSet('h', 'a', 'x');
         * $redisCluster->hSet('h', 'b', 'y');
         * $redisCluster->hSet('h', 'c', 'z');
         * $redisCluster->hSet('h', 'd', 't');
         * var_dump($redisCluster->hGetAll('h'));
         *
         *  Output:
         * //
         * // array(4) {
         * //   ["a"]=>
         * //   string(1) "x"
         * //   ["b"]=>
         * //   string(1) "y"
         * //   ["c"]=>
         * //   string(1) "z"
         * //   ["d"]=>
         * //   string(1) "t"
         * // }
         * // The order is random and corresponds to redis' own internal representation of the set structure.
         * </pre>
         */
        public function hGetAll($key) { }
    
        /**
         * Verify if the specified member exists in a key.
         *
         * @param   string $key
         * @param   string $hashKey
         *
         * @return  bool:   If the member exists in the hash table, return TRUE, otherwise return FALSE.
         * @link    http://redis.io/commands/hexists
         * @example
         * <pre>
         * $redisCluster->hSet('h', 'a', 'x');
         * $redisCluster->hExists('h', 'a');               //  TRUE
         * $redisCluster->hExists('h', 'NonExistingKey');  // FALSE
         * </pre>
         */
        public function hExists($key, $hashKey) { }
    
        /**
         * Increments the value of a member from a hash by a given amount.
         *
         * @param   string $key
         * @param   string $hashKey
         * @param   int    $value (integer) value that will be added to the member's value
         *
         * @return  int     the new value
         * @link    http://redis.io/commands/hincrby
         * @example
         * <pre>
         * $redisCluster->del('h');
         * $redisCluster->hIncrBy('h', 'x', 2); // returns 2: h[x] = 2 now.
         * $redisCluster->hIncrBy('h', 'x', 1); // h[x] ← 2 + 1. Returns 3
         * </pre>
         */
        public function hIncrBy($key, $hashKey, $value) { }
    
        /**
         * Adds a value to the hash stored at key. If this value is already in the hash, FALSE is returned.
         *
         * @param string $key
         * @param string $hashKey
         * @param string $value
         *
         * @return int
         * 1 if value didn't exist and was added successfully,
         * 0 if the value was already present and was replaced, FALSE if there was an error.
         * @link    http://redis.io/commands/hset
         * @example
         * <pre>
         * $redisCluster->del('h')
         * $redisCluster->hSet('h', 'key1', 'hello');  // 1, 'key1' => 'hello' in the hash at "h"
         * $redisCluster->hGet('h', 'key1');           // returns "hello"
         *
         * $redisCluster->hSet('h', 'key1', 'plop');   // 0, value was replaced.
         * $redisCluster->hGet('h', 'key1');           // returns "plop"
         * </pre>
         */
        public function hSet($key, $hashKey, $value) { }
    
        /**
         * Adds a value to the hash stored at key only if this field isn't already in the hash.
         *
         * @param   string $key
         * @param   string $hashKey
         * @param   string $value
         *
         * @return  bool    TRUE if the field was set, FALSE if it was already present.
         * @link    http://redis.io/commands/hsetnx
         * @example
         * <pre>
         * $redisCluster->del('h')
         * $redisCluster->hSetNx('h', 'key1', 'hello'); // TRUE, 'key1' => 'hello' in the hash at "h"
         * $redisCluster->hSetNx('h', 'key1', 'world'); // FALSE, 'key1' => 'hello' in the hash at "h". No change since the
         * field wasn't replaced.
         * </pre>
         */
        public function hSetNx($key, $hashKey, $value) { }
    
        /**
         * Retirieve the values associated to the specified fields in the hash.
         *
         * @param   string $key
         * @param   array  $hashKeys
         *
         * @return  array   Array An array of elements, the values of the specified fields in the hash,
         * with the hash keys as array keys.
         * @link    http://redis.io/commands/hmget
         * @example
         * <pre>
         * $redisCluster->del('h');
         * $redisCluster->hSet('h', 'field1', 'value1');
         * $redisCluster->hSet('h', 'field2', 'value2');
         * $redisCluster->hMGet('h', array('field1', 'field2')); // returns array('field1' => 'value1', 'field2' =>
         * 'value2')
         * </pre>
         */
        public function hMGet($key, $hashKeys) { }
    
        /**
         * Fills in a whole hash. Non-string values are converted to string, using the standard (string) cast.
         * NULL values are stored as empty strings
         *
         * @param   string $key
         * @param   array  $hashKeys key → value array
         *
         * @return  bool
         * @link    http://redis.io/commands/hmset
         * @example
         * <pre>
         * $redisCluster->del('user:1');
         * $redisCluster->hMSet('user:1', array('name' => 'Joe', 'salary' => 2000));
         * $redisCluster->hIncrBy('user:1', 'salary', 100); // Joe earns 100 more now.
         * </pre>
         */
        public function hMSet($key, $hashKeys) { }
    
        /**
         * Removes a values from the hash stored at key.
         * If the hash table doesn't exist, or the key doesn't exist, FALSE is returned.
         *
         * @param   string $key
         * @param   string $hashKey1
         * @param   string $hashKey2
         * @param   string $hashKeyN
         *
         * @return  int     Number of deleted fields
         * @link    http://redis.io/commands/hdel
         * @example
         * <pre>
         * $redisCluster->hMSet('h',
         *               array(
         *                    'f1' => 'v1',
         *                    'f2' => 'v2',
         *                    'f3' => 'v3',
         *                    'f4' => 'v4',
         *               ));
         *
         * var_dump( $redisCluster->hDel('h', 'f1') );        // int(1)
         * var_dump( $redisCluster->hDel('h', 'f2', 'f3') );  // int(2)
         *
         * var_dump( $redisCluster->hGetAll('h') );
         *
         *  Output:
         * //
         * //  array(1) {
         * //    ["f4"]=> string(2) "v4"
         * //  }
         * </pre>
         */
        public function hDel($key, $hashKey1, $hashKey2 = null, $hashKeyN = null) { }
    
        /**
         * Increment the float value of a hash field by the given amount
         *
         * @param   string $key
         * @param   string $field
         * @param   float  $increment
         *
         * @return  float
         * @link    http://redis.io/commands/hincrbyfloat
         * @example
         * <pre>
         * $redisCluster->hset('h', 'float', 3);
         * $redisCluster->hset('h', 'int',   3);
         * var_dump( $redisCluster->hIncrByFloat('h', 'float', 1.5) ); // float(4.5)
         *
         * var_dump( $redisCluster->hGetAll('h') );
         *
         *  Output:
         * //
         * // array(2) {
         * //   ["float"]=>
         * //   string(3) "4.5"
         * //   ["int"]=>
         * //   string(1) "3"
         * // }
         * </pre>
         */
        public function hIncrByFloat($key, $field, $increment) { }
    
        /**
         * Dump a key out of a redis database, the value of which can later be passed into redis using the RESTORE command.
         * The data that comes out of DUMP is a binary representation of the key as Redis stores it.
         *
         * @param   string $key
         *
         * @return  string  The Redis encoded value of the key, or FALSE if the key doesn't exist
         * @link    http://redis.io/commands/dump
         * @example
         * <pre>
         * $redisCluster->set('foo', 'bar');
         * $val = $redisCluster->dump('foo'); // $val will be the Redis encoded key value
         * </pre>
         */
        public function dump($key) { }
    
        /**
         * Returns the rank of a given member in the specified sorted set, starting at 0 for the item
         * with the smallest score. zRevRank starts at 0 for the item with the largest score.
         *
         * @param   string $key
         * @param   string $member
         *
         * @return  int     the item's score.
         * @link    http://redis.io/commands/zrank
         * @example
         * <pre>
         * $redisCluster->del('z');
         * $redisCluster->zAdd('key', 1, 'one');
         * $redisCluster->zAdd('key', 2, 'two');
         * $redisCluster->zRank('key', 'one');     // 0
         * $redisCluster->zRank('key', 'two');     // 1
         * $redisCluster->zRevRank('key', 'one');  // 1
         * $redisCluster->zRevRank('key', 'two');  // 0
         * </pre>
         */
        public function zRank($key, $member) { }
    
        /**
         * @see    zRank()
         *
         * @param  string $key
         * @param  string $member
         *
         * @return int    the item's score
         * @link   http://redis.io/commands/zrevrank
         */
        public function zRevRank($key, $member) { }
    
        /**
         * Increment the number stored at key by one.
         *
         * @param   string $key
         *
         * @return  int    the new value
         * @link    http://redis.io/commands/incr
         * @example
         * <pre>
         * $redisCluster->incr('key1'); // key1 didn't exists, set to 0 before the increment and now has the value 1
         * $redisCluster->incr('key1'); // 2
         * $redisCluster->incr('key1'); // 3
         * $redisCluster->incr('key1'); // 4
         * </pre>
         */
        public function incr($key) { }
    
        /**
         * Decrement the number stored at key by one.
         *
         * @param   string $key
         *
         * @return  int    the new value
         * @link    http://redis.io/commands/decr
         * @example
         * <pre>
         * $redisCluster->decr('key1'); // key1 didn't exists, set to 0 before the increment and now has the value -1
         * $redisCluster->decr('key1'); // -2
         * $redisCluster->decr('key1'); // -3
         * </pre>
         */
        public function decr($key) { }
    
        /**
         * Increment the number stored at key by one. If the second argument is filled, it will be used as the integer
         * value of the increment.
         *
         * @param   string $key   key
         * @param   int    $value value that will be added to key (only for incrBy)
         *
         * @return  int         the new value
         * @link    http://redis.io/commands/incrby
         * @example
         * <pre>
         * $redisCluster->incr('key1');        // key1 didn't exists, set to 0 before the increment and now has the value 1
         * $redisCluster->incr('key1');        // 2
         * $redisCluster->incr('key1');        // 3
         * $redisCluster->incr('key1');        // 4
         * $redisCluster->incrBy('key1', 10);  // 14
         * </pre>
         */
        public function incrBy($key, $value) { }
    
        /**
         * Decrement the number stored at key by one. If the second argument is filled, it will be used as the integer
         * value of the decrement.
         *
         * @param   string $key
         * @param   int    $value that will be substracted to key (only for decrBy)
         *
         * @return  int       the new value
         * @link    http://redis.io/commands/decrby
         * @example
         * <pre>
         * $redisCluster->decr('key1');        // key1 didn't exists, set to 0 before the increment and now has the value -1
         * $redisCluster->decr('key1');        // -2
         * $redisCluster->decr('key1');        // -3
         * $redisCluster->decrBy('key1', 10);  // -13
         * </pre>
         */
        public function decrBy($key, $value) { }
    
        /**
         * Increment the float value of a key by the given amount
         *
         * @param   string $key
         * @param   float  $increment
         *
         * @return  float
         * @link    http://redis.io/commands/incrbyfloat
         * @example
         * <pre>
         * $redisCluster->set('x', 3);
         * var_dump( $redisCluster->incrByFloat('x', 1.5) );   // float(4.5)
         *
         * var_dump( $redisCluster->get('x') );                // string(3) "4.5"
         * </pre>
         */
        public function incrByFloat($key, $increment) { }
    
        /**
         * Sets an expiration date (a timeout) on an item.
         *
         * @param   string $key The key that will disappear.
         * @param   int    $ttl The key's remaining Time To Live, in seconds.
         *
         * @return  bool:   TRUE in case of success, FALSE in case of failure.
         * @link    http://redis.io/commands/expire
         * @example
         * <pre>
         * $redisCluster->set('x', '42');
         * $redisCluster->expire('x', 3);  // x will disappear in 3 seconds.
         * sleep(5);                    // wait 5 seconds
         * $redisCluster->get('x');            // will return `FALSE`, as 'x' has expired.
         * </pre>
         */
        public function expire($key, $ttl) { }
    
        /**
         * Sets an expiration date (a timeout in milliseconds) on an item.
         *
         * @param   string $key The key that will disappear.
         * @param   int    $ttl The key's remaining Time To Live, in milliseconds.
         *
         * @return  bool:   TRUE in case of success, FALSE in case of failure.
         * @link    http://redis.io/commands/pexpire
         * @example
         * <pre>
         * $redisCluster->set('x', '42');
         * $redisCluster->pExpire('x', 11500); // x will disappear in 11500 milliseconds.
         * $redisCluster->ttl('x');            // 12
         * $redisCluster->pttl('x');           // 11500
         * </pre>
         */
        public function pExpire($key, $ttl) { }
    
        /**
         * Sets an expiration date (a timestamp) on an item.
         *
         * @param   string $key       The key that will disappear.
         * @param   int    $timestamp Unix timestamp. The key's date of death, in seconds from Epoch time.
         *
         * @return  bool:   TRUE in case of success, FALSE in case of failure.
         * @link    http://redis.io/commands/expireat
         * @example
         * <pre>
         * $redisCluster->set('x', '42');
         * $now = time();               // current timestamp
         * $redisCluster->expireAt('x', $now + 3); // x will disappear in 3 seconds.
         * sleep(5);                        // wait 5 seconds
         * $redisCluster->get('x');                // will return `FALSE`, as 'x' has expired.
         * </pre>
         */
        public function expireAt($key, $timestamp) { }
    
        /**
         * Sets an expiration date (a timestamp) on an item. Requires a timestamp in milliseconds
         *
         * @param   string $key       The key that will disappear.
         * @param   int    $timestamp Unix timestamp. The key's date of death, in seconds from Epoch time.
         *
         * @return  bool:   TRUE in case of success, FALSE in case of failure.
         * @link    http://redis.io/commands/pexpireat
         * @example
         * <pre>
         * $redisCluster->set('x', '42');
         * $redisCluster->pExpireAt('x', 1555555555005);
         * $redisCluster->ttl('x');                       // 218270121
         * $redisCluster->pttl('x');                      // 218270120575
         * </pre>
         */
        public function pExpireAt($key, $timestamp) { }
    
        /**
         * Append specified string to the string stored in specified key.
         *
         * @param   string $key
         * @param   string $value
         *
         * @return  int:    Size of the value after the append
         * @link    http://redis.io/commands/append
         * @example
         * <pre>
         * $redisCluster->set('key', 'value1');
         * $redisCluster->append('key', 'value2'); // 12
         * $redisCluster->get('key');              // 'value1value2'
         * </pre>
         */
        public function append($key, $value) { }
    
        /**
         * Return a single bit out of a larger string
         *
         * @param   string $key
         * @param   int    $offset
         *
         * @return  int:    the bit value (0 or 1)
         * @link    http://redis.io/commands/getbit
         * @example
         * <pre>
         * $redisCluster->set('key', "\x7f");  // this is 0111 1111
         * $redisCluster->getBit('key', 0);    // 0
         * $redisCluster->getBit('key', 1);    // 1
         * </pre>
         */
        public function getBit($key, $offset) { }
    
        /**
         * Changes a single bit of a string.
         *
         * @param   string   $key
         * @param   int      $offset
         * @param   bool|int $value bool or int (1 or 0)
         *
         * @return  int:    0 or 1, the value of the bit before it was set.
         * @link    http://redis.io/commands/setbit
         * @example
         * <pre>
         * $redisCluster->set('key', "*");     // ord("*") = 42 = 0x2f = "0010 1010"
         * $redisCluster->setBit('key', 5, 1); // returns 0
         * $redisCluster->setBit('key', 7, 1); // returns 0
         * $redisCluster->get('key');          // chr(0x2f) = "/" = b("0010 1111")
         * </pre>
         */
        public function setBit($key, $offset, $value) { }
    
        /**
         * Bitwise operation on multiple keys.
         *
         * @param   string $operation either "AND", "OR", "NOT", "XOR"
         * @param   string $retKey    return key
         * @param   string $key1
         * @param   string $key2
         * @param   string $key3
         *
         * @return  int     The size of the string stored in the destination key.
         * @link    http://redis.io/commands/bitop
         * @example
         * <pre>
         * $redisCluster->set('bit1', '1'); // 11 0001
         * $redisCluster->set('bit2', '2'); // 11 0010
         *
         * $redisCluster->bitOp('AND', 'bit', 'bit1', 'bit2'); // bit = 110000
         * $redisCluster->bitOp('OR',  'bit', 'bit1', 'bit2'); // bit = 110011
         * $redisCluster->bitOp('NOT', 'bit', 'bit1', 'bit2'); // bit = 110011
         * $redisCluster->bitOp('XOR', 'bit', 'bit1', 'bit2'); // bit = 11
         * </pre>
         */
        public function bitOp($operation, $retKey, $key1, $key2, $key3 = null) { }
    
        /**
         * Return the position of the first bit set to 1 or 0 in a string. The position is returned, thinking of the
         * string as an array of bits from left to right, where the first byte's most significant bit is at position 0,
         * the second byte's most significant bit is at position 8, and so forth.
         *
         * @param   string $key
         * @param   int    $bit
         * @param   int    $start
         * @param   int    $end
         *
         * @return  int     The command returns the position of the first bit set to 1 or 0 according to the request.
         *                  If we look for set bits (the bit argument is 1) and the string is empty or composed of just
         *                  zero bytes, -1 is returned. If we look for clear bits (the bit argument is 0) and the string
         *                  only contains bit set to 1, the function returns the first bit not part of the string on the
         *                  right. So if the string is three bytes set to the value 0xff the command BITPOS key 0 will
         *                  return 24, since up to bit 23 all the bits are 1. Basically, the function considers the right
         *                  of the string as padded with zeros if you look for clear bits and specify no range or the
         *                  start argument only. However, this behavior changes if you are looking for clear bits and
         *                  specify a range with both start and end. If no clear bit is found in the specified range, the
         *                  function returns -1 as the user specified a clear range and there are no 0 bits in that range.
         * @link    http://redis.io/commands/bitpos
         * @example
         * <pre>
         * $redisCluster->set('key', '\xff\xff');
         * $redisCluster->bitpos('key', 1); // int(0)
         * $redisCluster->bitpos('key', 1, 1); // int(8)
         * $redisCluster->bitpos('key', 1, 3); // int(-1)
         * $redisCluster->bitpos('key', 0); // int(16)
         * $redisCluster->bitpos('key', 0, 1); // int(16)
         * $redisCluster->bitpos('key', 0, 1, 5); // int(-1)
         * </pre>
         */
        public function bitpos($key, $bit, $start = 0, $end = null) { }
    
        /**
         * Count bits in a string.
         *
         * @param   string $key
         *
         * @return  int     The number of bits set to 1 in the value behind the input key.
         * @link    http://redis.io/commands/bitcount
         * @example
         * <pre>
         * $redisCluster->set('bit', '345'); // // 11 0011  0011 0100  0011 0101
         * var_dump( $redisCluster->bitCount('bit', 0, 0) ); // int(4)
         * var_dump( $redisCluster->bitCount('bit', 1, 1) ); // int(3)
         * var_dump( $redisCluster->bitCount('bit', 2, 2) ); // int(4)
         * var_dump( $redisCluster->bitCount('bit', 0, 2) ); // int(11)
         * </pre>
         */
        public function bitCount($key) { }
    
        /**
         * @see     lIndex()
         *
         * @param   string $key
         * @param   int    $index
         *
         * @link    http://redis.io/commands/lindex
         */
        public function lGet($key, $index) { }
    
        /**
         * Return a substring of a larger string
         *
         * @param   string $key
         * @param   int    $start
         * @param   int    $end
         *
         * @return  string: the substring
         * @link    http://redis.io/commands/getrange
         * @example
         * <pre>
         * $redisCluster->set('key', 'string value');
         * $redisCluster->getRange('key', 0, 5);   // 'string'
         * $redisCluster->getRange('key', -5, -1); // 'value'
         * </pre>
         */
        public function getRange($key, $start, $end) { }
    
        /**
         * Trims an existing list so that it will contain only a specified range of elements.
         *
         * @param string $key
         * @param int    $start
         * @param int    $stop
         *
         * @return array    Bool return FALSE if the key identify a non-list value.
         * @link        http://redis.io/commands/ltrim
         * @example
         * <pre>
         * $redisCluster->rPush('key1', 'A');
         * $redisCluster->rPush('key1', 'B');
         * $redisCluster->rPush('key1', 'C');
         * $redisCluster->lRange('key1', 0, -1); // array('A', 'B', 'C')
         * $redisCluster->lTrim('key1', 0, 1);
         * $redisCluster->lRange('key1', 0, -1); // array('A', 'B')
         * </pre>
         */
        public function lTrim($key, $start, $stop) { }
    
        /**
         * Returns the specified elements of the list stored at the specified key in
         * the range [start, end]. start and stop are interpretated as indices: 0 the first element,
         * 1 the second ... -1 the last element, -2 the penultimate ...
         *
         * @param   string $key
         * @param   int    $start
         * @param   int    $end
         *
         * @return  array containing the values in specified range.
         * @link    http://redis.io/commands/lrange
         * @example
         * <pre>
         * $redisCluster->rPush('key1', 'A');
         * $redisCluster->rPush('key1', 'B');
         * $redisCluster->rPush('key1', 'C');
         * $redisCluster->lRange('key1', 0, -1); // array('A', 'B', 'C')
         * </pre>
         */
        public function lRange($key, $start, $end) { }
    
        /**
         * Deletes the elements of the sorted set stored at the specified key which have rank in the range [start,end].
         *
         * @param   string $key
         * @param   int    $start
         * @param   int    $end
         *
         * @return  int     The number of values deleted from the sorted set
         * @link    http://redis.io/commands/zremrangebyrank
         * @example
         * <pre>
         * $redisCluster->zAdd('key', 1, 'one');
         * $redisCluster->zAdd('key', 2, 'two');
         * $redisCluster->zAdd('key', 3, 'three');
         * $redisCluster->zRemRangeByRank('key', 0, 1); // 2
         * $redisCluster->zRange('key', 0, -1, true); // array('three' => 3)
         * </pre>
         */
        public function zRemRangeByRank($key, $start, $end) { }
    
        /**
         * Publish messages to channels. Warning: this function will probably change in the future.
         *
         * @param   string $channel a channel to publish to
         * @param   string $message string
         *
         * @link    http://redis.io/commands/publish
         * @return  int Number of clients that received the message
         * @example $redisCluster->publish('chan-1', 'hello, world!'); // send message.
         */
        public function publish($channel, $message) { }
    
        /**
         * Renames a key.
         *
         * @param   string $srcKey
         * @param   string $dstKey
         *
         * @return  bool:   TRUE in case of success, FALSE in case of failure.
         * @link    http://redis.io/commands/rename
         * @example
         * <pre>
         * $redisCluster->set('x', '42');
         * $redisCluster->rename('x', 'y');
         * $redisCluster->get('y');   // → 42
         * $redisCluster->get('x');   // → `FALSE`
         * </pre>
         */
        public function rename($srcKey, $dstKey) { }
    
        /**
         * Renames a key.
         *
         * Same as rename, but will not replace a key if the destination already exists.
         * This is the same behaviour as setNx.
         *
         * @param   string $srcKey
         * @param   string $dstKey
         *
         * @return  bool:   TRUE in case of success, FALSE in case of failure.
         * @link    http://redis.io/commands/renamenx
         * @example
         * <pre>
         * $redisCluster->set('x', '42');
         * $redisCluster->renameNx('x', 'y');
         * $redisCluster->get('y');   // → 42
         * $redisCluster->get('x');   // → `FALSE`
         * </pre>
         */
        public function renameNx($srcKey, $dstKey) { }
    
        /**
         * When called with a single key, returns the approximated cardinality computed by the HyperLogLog data
         * structure stored at the specified variable, which is 0 if the variable does not exist.
         *
         * @param   string | array $key
         *
         * @return  int
         * @link    http://redis.io/commands/pfcount
         * @example
         * <pre>
         * $redisCluster->pfAdd('key1', array('elem1', 'elem2'));
         * $redisCluster->pfAdd('key2', array('elem3', 'elem2'));
         * $redisCluster->pfCount('key1'); // int(2)
         * $redisCluster->pfCount(array('key1', 'key2')); // int(3)
         */
        public function pfCount($key) { }
    
        /**
         * Adds all the element arguments to the HyperLogLog data structure stored at the key.
         *
         * @param   string $key
         * @param   array  $elements
         *
         * @return  bool
         * @link    http://redis.io/commands/pfadd
         * @example $redisCluster->pfAdd('key', array('elem1', 'elem2'))
         */
        public function pfAdd($key, array $elements) { }
    
        /**
         * Merge multiple HyperLogLog values into an unique value that will approximate the cardinality
         * of the union of the observed Sets of the source HyperLogLog structures.
         *
         * @param   string $destKey
         * @param   array  $sourceKeys
         *
         * @return  bool
         * @link    http://redis.io/commands/pfmerge
         * @example
         * <pre>
         * $redisCluster->pfAdd('key1', array('elem1', 'elem2'));
         * $redisCluster->pfAdd('key2', array('elem3', 'elem2'));
         * $redisCluster->pfMerge('key3', array('key1', 'key2'));
         * $redisCluster->pfCount('key3'); // int(3)
         */
        public function pfMerge($destKey, array $sourceKeys) { }
    
        /**
         * Changes a substring of a larger string.
         *
         * @param   string $key
         * @param   int    $offset
         * @param   string $value
         *
         * @return  string: the length of the string after it was modified.
         * @link    http://redis.io/commands/setrange
         * @example
         * <pre>
         * $redisCluster->set('key', 'Hello world');
         * $redisCluster->setRange('key', 6, "redis"); // returns 11
         * $redisCluster->get('key');                  // "Hello redis"
         * </pre>
         */
        public function setRange($key, $offset, $value) { }
    
        /**
         * Restore a key from the result of a DUMP operation.
         *
         * @param   string $key   The key name
         * @param   int    $ttl   How long the key should live (if zero, no expire will be set on the key)
         * @param   string $value (binary).  The Redis encoded key value (from DUMP)
         *
         * @return  bool
         * @link    http://redis.io/commands/restore
         * @example
         * <pre>
         * $redisCluster->set('foo', 'bar');
         * $val = $redisCluster->dump('foo');
         * $redisCluster->restore('bar', 0, $val); // The key 'bar', will now be equal to the key 'foo'
         * </pre>
         */
        public function restore($key, $ttl, $value) { }
    
        /**
         * Moves the specified member from the set at srcKey to the set at dstKey.
         *
         * @param   string $srcKey
         * @param   string $dstKey
         * @param   string $member
         *
         * @return  bool    If the operation is successful, return TRUE.
         * If the srcKey and/or dstKey didn't exist, and/or the member didn't exist in srcKey, FALSE is returned.
         * @link    http://redis.io/commands/smove
         * @example
         * <pre>
         * $redisCluster->sAdd('key1' , 'set11');
         * $redisCluster->sAdd('key1' , 'set12');
         * $redisCluster->sAdd('key1' , 'set13');          // 'key1' => {'set11', 'set12', 'set13'}
         * $redisCluster->sAdd('key2' , 'set21');
         * $redisCluster->sAdd('key2' , 'set22');          // 'key2' => {'set21', 'set22'}
         * $redisCluster->sMove('key1', 'key2', 'set13');  // 'key1' =>  {'set11', 'set12'}
         *                                          // 'key2' =>  {'set21', 'set22', 'set13'}
         * </pre>
         */
        public function sMove($srcKey, $dstKey, $member) { }
    
        /**
         * Returns a range of elements from the ordered set stored at the specified key,
         * with values in the range [start, end]. start and stop are interpreted as zero-based indices:
         * 0 the first element,
         * 1 the second ...
         * -1 the last element,
         * -2 the penultimate ...
         *
         * @param   string $key
         * @param   int    $start
         * @param   int    $end
         * @param   bool   $withscores
         *
         * @return  array   Array containing the values in specified range.
         * @link    http://redis.io/commands/zrange
         * @example
         * <pre>
         * $redisCluster->zAdd('key1', 0, 'val0');
         * $redisCluster->zAdd('key1', 2, 'val2');
         * $redisCluster->zAdd('key1', 10, 'val10');
         * $redisCluster->zRange('key1', 0, -1); // array('val0', 'val2', 'val10')
         * // with scores
         * $redisCluster->zRange('key1', 0, -1, true); // array('val0' => 0, 'val2' => 2, 'val10' => 10)
         * </pre>
         */
        public function zRange($key, $start, $end, $withscores = null) { }
    
        /**
         * Returns the elements of the sorted set stored at the specified key in the range [start, end]
         * in reverse order. start and stop are interpretated as zero-based indices:
         * 0 the first element,
         * 1 the second ...
         * -1 the last element,
         * -2 the penultimate ...
         *
         * @param   string $key
         * @param   int    $start
         * @param   int    $end
         * @param   bool   $withscore
         *
         * @return  array   Array containing the values in specified range.
         * @link    http://redis.io/commands/zrevrange
         * @example
         * <pre>
         * $redisCluster->zAdd('key', 0, 'val0');
         * $redisCluster->zAdd('key', 2, 'val2');
         * $redisCluster->zAdd('key', 10, 'val10');
         * $redisCluster->zRevRange('key', 0, -1); // array('val10', 'val2', 'val0')
         *
         * // with scores
         * $redisCluster->zRevRange('key', 0, -1, true); // array('val10' => 10, 'val2' => 2, 'val0' => 0)
         * </pre>
         */
        public function zRevRange($key, $start, $end, $withscore = null) { }
    
        /**
         * Returns the elements of the sorted set stored at the specified key which have scores in the
         * range [start,end]. Adding a parenthesis before start or end excludes it from the range.
         * +inf and -inf are also valid limits.
         *
         * zRevRangeByScore returns the same items in reverse order, when the start and end parameters are swapped.
         *
         * @param   string $key
         * @param   int    $start
         * @param   int    $end
         * @param   array  $options Two options are available:
         *                          - withscores => TRUE,
         *                          - and limit => array($offset, $count)
         *
         * @return  array   Array containing the values in specified range.
         * @link    http://redis.io/commands/zrangebyscore
         * @example
         * <pre>
         * $redisCluster->zAdd('key', 0, 'val0');
         * $redisCluster->zAdd('key', 2, 'val2');
         * $redisCluster->zAdd('key', 10, 'val10');
         * $redisCluster->zRangeByScore('key', 0, 3);
         * // array('val0', 'val2')
         * $redisCluster->zRangeByScore('key', 0, 3, array('withscores' => TRUE);
         * // array('val0' => 0, 'val2' => 2)
         * $redisCluster->zRangeByScore('key', 0, 3, array('limit' => array(1, 1));
         * // array('val2' => 2)
         * $redisCluster->zRangeByScore('key', 0, 3, array('limit' => array(1, 1));
         * // array('val2')
         * $redisCluster->zRangeByScore('key', 0, 3, array('withscores' => TRUE, 'limit' => array(1, 1));
         * // array('val2'=> 2)
         * </pre>
         */
        public function zRangeByScore($key, $start, $end, array $options = array()) { }
    
        /**
         * @see zRangeByScore()
         *
         * @param   string $key
         * @param   int    $start
         * @param   int    $end
         * @param   array  $options
         *
         * @return    array
         */
        public function zRevRangeByScore($key, $start, $end, array $options = array()) { }
    
        /**
         * Returns a range of members in a sorted set, by lexicographical range
         *
         * @param   string $key    The ZSET you wish to run against.
         * @param   int    $min    The minimum alphanumeric value you wish to get.
         * @param   int    $max    The maximum alphanumeric value you wish to get.
         * @param   int    $offset Optional argument if you wish to start somewhere other than the first element.
         * @param   int    $limit  Optional argument if you wish to limit the number of elements returned.
         *
         * @return  array   Array containing the values in the specified range.
         * @link    http://redis.io/commands/zrangebylex
         * @example
         * <pre>
         * foreach (array('a', 'b', 'c', 'd', 'e', 'f', 'g') as $k => $char) {
         *     $redisCluster->zAdd('key', $k, $char);
         * }
         *
         * $redisCluster->zRangeByLex('key', '-', '[c'); // array('a', 'b', 'c')
         * $redisCluster->zRangeByLex('key', '-', '(c'); // array('a', 'b')
         * $redisCluster->zRevRangeByLex('key', '(c','-'); // array('b', 'a')
         * </pre>
         */
        public function zRangeByLex($key, $min, $max, $offset = null, $limit = null) { }
    
        /**
         * @see     zRangeByLex()
         *
         * @param   string $key
         * @param   int    $min
         * @param   int    $max
         * @param   int    $offset
         * @param   int    $limit
         *
         * @return  array
         * @link    http://redis.io/commands/zrevrangebylex
         */
        public function zRevRangeByLex($key, $min, $max, $offset = null, $limit = null) { }
    
        /**
         * Count the number of members in a sorted set between a given lexicographical range.
         *
         * @param   string $key
         * @param   int    $min
         * @param   int    $max
         *
         * @return  int The number of elements in the specified score range.
         * @link    http://redis.io/commands/zlexcount
         * @example
         * <pre>
         * foreach (array('a', 'b', 'c', 'd', 'e', 'f', 'g') as $k => $char) {
         *     $redisCluster->zAdd('key', $k, $char);
         * }
         * $redisCluster->zLexCount('key', '[b', '[f'); // 5
         * </pre>
         */
        public function zLexCount($key, $min, $max) { }
    
        /**
         * Remove all members in a sorted set between the given lexicographical range.
         *
         * @param   string $key The ZSET you wish to run against.
         * @param   int    $min The minimum alphanumeric value you wish to get.
         * @param   int    $max The maximum alphanumeric value you wish to get.
         *
         * @return  array    the number of elements removed.
         * @link    http://redis.io/commands/zremrangebylex
         * @example
         * <pre>
         * foreach (array('a', 'b', 'c', 'd', 'e', 'f', 'g') as $k => $char) {
         *     $redisCluster->zAdd('key', $k, $char);
         * }
         * $redisCluster->zRemRangeByLex('key', '(b','[d'); // 2 , remove element 'c' and 'd'
         * $redisCluster->zRange('key',0,-1);// array('a','b','e','f','g')
         * </pre>
         */
        public function zRemRangeByLex($key, $min, $max) {
        }
    
        /**
         * Add multiple sorted sets and store the resulting sorted set in a new key
         *
         * @param string $Output
         * @param array  $ZSetKeys
         * @param array  $Weights
         * @param string $aggregateFunction Either "SUM", "MIN", or "MAX": defines the behaviour to use on
         *                                  duplicate entries during the zUnion.
         *
         * @return int The number of values in the new sorted set.
         * @link    http://redis.io/commands/zunionstore
         * @example
         * <pre>
         * $redisCluster->del('k1');
         * $redisCluster->del('k2');
         * $redisCluster->del('k3');
         * $redisCluster->del('ko1');
         * $redisCluster->del('ko2');
         * $redisCluster->del('ko3');
         *
         * $redisCluster->zAdd('k1', 0, 'val0');
         * $redisCluster->zAdd('k1', 1, 'val1');
         *
         * $redisCluster->zAdd('k2', 2, 'val2');
         * $redisCluster->zAdd('k2', 3, 'val3');
         *
         * $redisCluster->zUnionStore('ko1', array('k1', 'k2')); // 4, 'ko1' => array('val0', 'val1', 'val2', 'val3')
         *
         * // Weighted zUnionStore
         * $redisCluster->zUnionStore('ko2', array('k1', 'k2'), array(1, 1)); // 4, 'ko2' => array('val0', 'val1', 'val2','val3')
         * $redisCluster->zUnionStore('ko3', array('k1', 'k2'), array(5, 1)); // 4, 'ko3' => array('val0', 'val2', 'val3','val1')
         * </pre>
         */
        public function zUnionStore($Output, $ZSetKeys, array $Weights = null, $aggregateFunction = 'SUM') { }
    
        /**
         * Intersect multiple sorted sets and store the resulting sorted set in a new key
         *
         * @param   string $Output
         * @param   array  $ZSetKeys
         * @param   array  $Weights
         * @param   string $aggregateFunction Either "SUM", "MIN", or "MAX":
         *                                    defines the behaviour to use on duplicate entries during the zInterStore.
         *
         * @return  int     The number of values in the new sorted set.
         * @link    http://redis.io/commands/zinterstore
         * @example
         * <pre>
         * $redisCluster->del('k1');
         * $redisCluster->del('k2');
         * $redisCluster->del('k3');
         *
         * $redisCluster->del('ko1');
         * $redisCluster->del('ko2');
         * $redisCluster->del('ko3');
         * $redisCluster->del('ko4');
         *
         * $redisCluster->zAdd('k1', 0, 'val0');
         * $redisCluster->zAdd('k1', 1, 'val1');
         * $redisCluster->zAdd('k1', 3, 'val3');
         *
         * $redisCluster->zAdd('k2', 2, 'val1');
         * $redisCluster->zAdd('k2', 3, 'val3');
         *
         * $redisCluster->zInterStore('ko1', array('k1', 'k2'));               // 2, 'ko1' => array('val1', 'val3')
         * $redisCluster->zInterStore('ko2', array('k1', 'k2'), array(1, 1));  // 2, 'ko2' => array('val1', 'val3')
         *
         * // Weighted zInterStore
         * $redisCluster->zInterStore('ko3', array('k1', 'k2'), array(1, 5), 'min'); // 2, 'ko3' => array('val1', 'val3')
         * $redisCluster->zInterStore('ko4', array('k1', 'k2'), array(1, 5), 'max'); // 2, 'ko4' => array('val3', 'val1')
         * </pre>
         */
        public function zInterStore($Output, $ZSetKeys, array $Weights = null, $aggregateFunction = 'SUM') { }
    
        /**
         * Deletes a specified member from the ordered set.
         *
         * @param   string $key
         * @param   string $member1
         * @param   string $member2
         * @param   string $memberN
         *
         * @return  int     Number of deleted values
         * @link    http://redis.io/commands/zrem
         * @example
         * <pre>
         * $redisCluster->zAdd('z', 1, 'v1', 2, 'v2', 3, 'v3', 4, 'v4' );  // int(2)
         * $redisCluster->zRem('z', 'v2', 'v3');                           // int(2)
         * var_dump( $redisCluster->zRange('z', 0, -1) );
         *  Output:
         * //
         * // array(2) {
         * //   [0]=> string(2) "v1"
         * //   [1]=> string(2) "v4"
         * // }
         * </pre>
         */
        public function zRem($key, $member1, $member2 = null, $memberN = null) { }
    
        /**
         * Sort
         *
         * @param   string $key
         * @param   array  $option array(key => value, ...) - optional, with the following keys and values:
         *                         - 'by' => 'some_pattern_*',
         *                         - 'limit' => array(0, 1),
         *                         - 'get' => 'some_other_pattern_*' or an array of patterns,
         *                         - 'sort' => 'asc' or 'desc',
         *                         - 'alpha' => TRUE,
         *                         - 'store' => 'external-key'
         *
         * @return  array
         * An array of values, or a number corresponding to the number of elements stored if that was used.
         * @link    http://redis.io/commands/sort
         * @example
         * <pre>
         * $redisCluster->del('s');
         * $redisCluster->sadd('s', 5);
         * $redisCluster->sadd('s', 4);
         * $redisCluster->sadd('s', 2);
         * $redisCluster->sadd('s', 1);
         * $redisCluster->sadd('s', 3);
         *
         * var_dump($redisCluster->sort('s')); // 1,2,3,4,5
         * var_dump($redisCluster->sort('s', array('sort' => 'desc'))); // 5,4,3,2,1
         * var_dump($redisCluster->sort('s', array('sort' => 'desc', 'store' => 'out'))); // (int)5
         * </pre>
         */
        public function sort($key, $option = null) { }
    
        /**
         * Describes the object pointed to by a key.
         * The information to retrieve (string) and the key (string).
         * Info can be one of the following:
         * - "encoding"
         * - "refcount"
         * - "idletime"
         *
         * @param   string $string
         * @param   string $key
         *
         * @return  string  for "encoding", int for "refcount" and "idletime", FALSE if the key doesn't exist.
         * @link    http://redis.io/commands/object
         * @example
         * <pre>
         * $redisCluster->object("encoding", "l"); // → ziplist
         * $redisCluster->object("refcount", "l"); // → 1
         * $redisCluster->object("idletime", "l"); // → 400 (in seconds, with a precision of 10 seconds).
         * </pre>
         */
        public function object($string = '', $key = '') { }
    
        /**
         * Subscribe to channels. Warning: this function will probably change in the future.
         *
         * @param array          $channels an array of channels to subscribe to
         * @param string | array $callback either a string or an array($instance, 'method_name').
         *                                 The callback function receives 3 parameters: the redis instance, the channel
         *                                 name, and the message.
         *
         * @return mixed            Any non-null return value in the callback will be returned to the caller.
         * @link    http://redis.io/commands/subscribe
         * @example
         * <pre>
         * function f($redisCluster, $chan, $msg) {
         *  switch($chan) {
         *      case 'chan-1':
         *          ...
         *          break;
         *
         *      case 'chan-2':
         *                     ...
         *          break;
         *
         *      case 'chan-2':
         *          ...
         *          break;
         *      }
         * }
         *
         * $redisCluster->subscribe(array('chan-1', 'chan-2', 'chan-3'), 'f'); // subscribe to 3 chans
         * </pre>
         */
        public function subscribe($channels, $callback) { }
    
        /**
         * Subscribe to channels by pattern
         *
         * @param   array          $patterns     The number of elements removed from the set.
         * @param   string | array $callback     Either a string or an array with an object and method.
         *                                       The callback will get four arguments ($redis, $pattern, $channel, $message)
         *
         * @return  mixed           Any non-null return value in the callback will be returned to the caller.
         *
         * @link    http://redis.io/commands/psubscribe
         * @example
         * <pre>
         * function psubscribe($redisCluster, $pattern, $chan, $msg) {
         *  echo "Pattern: $pattern\n";
         *  echo "Channel: $chan\n";
         *  echo "Payload: $msg\n";
         * }
         * </pre>
         */
        public function psubscribe($patterns, $callback) { }
    
        /**
         * Unsubscribes the client from the given channels, or from all of them if none is given.
         *
         * @param $channels
         * @param $callback
         */
        public function unSubscribe($channels, $callback) { }
    
        /**
         * Unsubscribes the client from the given patterns, or from all of them if none is given.
         *
         * @param $channels
         * @param $callback
         */
        public function punSubscribe($channels, $callback) { }
    
        /**
         * Evaluate a LUA script serverside, from the SHA1 hash of the script instead of the script itself.
         * In order to run this command Redis will have to have already loaded the script, either by running it or via
         * the SCRIPT LOAD command.
         *
         * @param   string $scriptSha
         * @param   array  $args
         * @param   int    $numKeys
         *
         * @return  mixed   @see eval()
         * @see     eval()
         * @link    http://redis.io/commands/evalsha
         * @example
         * <pre>
         * $script = 'return 1';
         * $sha = $redisCluster->script('load', $script);
         * $redisCluster->evalSha($sha); // Returns 1
         * </pre>
         */
        public function evalSha($scriptSha, $args = array(), $numKeys = 0) { }
    
        /**
         * Scan the keyspace for keys.
         *
         * @param  int    $iterator Iterator, initialized to NULL.
         * @param  string $pattern  Pattern to match.
         * @param  int    $count    Count of keys per iteration (only a suggestion to Redis).
         *
         * @return array            This function will return an array of keys or FALSE if there are no more keys.
         * @link   http://redis.io/commands/scan
         * @example
         * <pre>
         * $iterator = null;
         * while($keys = $redisCluster->scan($iterator)) {
         *     foreach($keys as $key) {
         *         echo $key . PHP_EOL;
         *     }
         * }
         * </pre>
         */
        public function scan(&$iterator, $pattern = null, $count = 0) { }
    
        /**
         * Scan a set for members.
         *
         * @param   string $key      The set to search.
         * @param   int    $iterator LONG (reference) to the iterator as we go.
         * @param   null   $pattern  String, optional pattern to match against.
         * @param   int    $count    How many members to return at a time (Redis might return a different amount).
         *
         * @return  array   PHPRedis will return an array of keys or FALSE when we're done iterating.
         * @link    http://redis.io/commands/sscan
         * @example
         * <pre>
         * $iterator = null;
         * while ($members = $redisCluster->sScan('set', $iterator)) {
         *     foreach ($members as $member) {
         *         echo $member . PHP_EOL;
         *     }
         * }
         * </pre>
         */
        public function sScan($key, &$iterator, $pattern = null, $count = 0) { }
    
        /**
         * Scan a sorted set for members, with optional pattern and count.
         *
         * @param   string $key      String, the set to scan.
         * @param   int    $iterator Long (reference), initialized to NULL.
         * @param   string $pattern  String (optional), the pattern to match.
         * @param   int    $count    How many keys to return per iteration (Redis might return a different number).
         *
         * @return  array   PHPRedis will return matching keys from Redis, or FALSE when iteration is complete.
         * @link    http://redis.io/commands/zscan
         * @example
         * <pre>
         * $iterator = null;
         * while ($members = $redis-zscan('zset', $iterator)) {
         *     foreach ($members as $member => $score) {
         *         echo $member . ' => ' . $score . PHP_EOL;
         *     }
         * }
         * </pre>
         */
        public function zScan($key, &$iterator, $pattern = null, $count = 0) { }
    
        /**
         * Scan a HASH value for members, with an optional pattern and count.
         *
         * @param   string $key
         * @param   int    $iterator
         * @param   string $pattern Optional pattern to match against.
         * @param   int    $count   How many keys to return in a go (only a sugestion to Redis).
         *
         * @return  array     An array of members that match our pattern.
         * @link    http://redis.io/commands/hscan
         * @example
         * <pre>
         * $iterator = null;
         * while($elements = $redisCluster->hscan('hash', $iterator)) {
         *    foreach($elements as $key => $value) {
         *         echo $key . ' => ' . $value . PHP_EOL;
         *     }
         * }
         * </pre>
         */
        public function hScan($key, &$iterator, $pattern = null, $count = 0) { }
    
        /**
         * Detect whether we're in ATOMIC/MULTI/PIPELINE mode.
         *
         * @return  int     Either RedisCluster::ATOMIC, RedisCluster::MULTI or RedisCluster::PIPELINE
         * @example $redisCluster->getMode();
         */
        public function getMode() { }
    
        /**
         * The last error message (if any)
         *
         * @return  string  A string with the last returned script based error message, or NULL if there is no error
         * @example
         * <pre>
         * $redisCluster->eval('this-is-not-lua');
         * $err = $redisCluster->getLastError();
         * // "ERR Error compiling script (new function): user_script:1: '=' expected near '-'"
         * </pre>
         */
        public function getLastError() { }
    
        /**
         * Clear the last error message
         *
         * @return bool true
         * @example
         * <pre>
         * $redisCluster->set('x', 'a');
         * $redisCluster->incr('x');
         * $err = $redisCluster->getLastError();
         * // "ERR value is not an integer or out of range"
         * $redisCluster->clearLastError();
         * $err = $redisCluster->getLastError();
         * // NULL
         * </pre>
         */
        public function clearLastError() { }
    
        /**
         * Get client option
         *
         * @param   string $name parameter name
         *
         * @return  int     Parameter value.
         * @example
         * // return RedisCluster::SERIALIZER_NONE, RedisCluster::SERIALIZER_PHP, or RedisCluster::SERIALIZER_IGBINARY.
         * $redisCluster->getOption(RedisCluster::OPT_SERIALIZER);
         */
        public function getOption($name) { }
    
        /**
         * Set client option.
         *
         * @param   string $name  parameter name
         * @param   string $value parameter value
         *
         * @return  bool:   TRUE on success, FALSE on error.
         * @example
         * <pre>
         * $redisCluster->setOption(RedisCluster::OPT_SERIALIZER, RedisCluster::SERIALIZER_NONE);        // don't serialize data
         * $redisCluster->setOption(RedisCluster::OPT_SERIALIZER, RedisCluster::SERIALIZER_PHP);         // use built-in serialize/unserialize
         * $redisCluster->setOption(RedisCluster::OPT_SERIALIZER, RedisCluster::SERIALIZER_IGBINARY);    // use igBinary serialize/unserialize
         * $redisCluster->setOption(RedisCluster::OPT_PREFIX, 'myAppName:');                             // use custom prefix on all keys
         * </pre>
         */
        public function setOption($name, $value) { }
    
        /**
         * A utility method to prefix the value with the prefix setting for phpredis.
         *
         * @param   mixed $value The value you wish to prefix
         *
         * @return  string  If a prefix is set up, the value now prefixed.  If there is no prefix, the value will be returned unchanged.
         * @example
         * <pre>
         * $redisCluster->setOption(RedisCluster::OPT_PREFIX, 'my-prefix:');
         * $redisCluster->_prefix('my-value'); // Will return 'my-prefix:my-value'
         * </pre>
         */
        public function _prefix($value) { }
    
        /**
         * A utility method to serialize values manually. This method allows you to serialize a value with whatever
         * serializer is configured, manually. This can be useful for serialization/unserialization of data going in
         * and out of EVAL commands as phpredis can't automatically do this itself.  Note that if no serializer is
         * set, phpredis will change Array values to 'Array', and Objects to 'Object'.
         *
         * @param   mixed $value The value to be serialized.
         *
         * @return  mixed
         * @example
         * <pre>
         * $redisCluster->setOption(RedisCluster::OPT_SERIALIZER, RedisCluster::SERIALIZER_NONE);
         * $redisCluster->_serialize("foo"); // returns "foo"
         * $redisCluster->_serialize(Array()); // Returns "Array"
         * $redisCluster->_serialize(new stdClass()); // Returns "Object"
         *
         * $redisCluster->setOption(RedisCluster::OPT_SERIALIZER, RedisCluster::SERIALIZER_PHP);
         * $redisCluster->_serialize("foo"); // Returns 's:3:"foo";'
         * </pre>
         */
        public function _serialize($value) { }
    
        /**
         * A utility method to unserialize data with whatever serializer is set up.  If there is no serializer set, the
         * value will be returned unchanged.  If there is a serializer set up, and the data passed in is malformed, an
         * exception will be thrown. This can be useful if phpredis is serializing values, and you return something from
         * redis in a LUA script that is serialized.
         *
         * @param   string $value The value to be unserialized
         *
         * @return mixed
         * @example
         * <pre>
         * $redisCluster->setOption(RedisCluster::OPT_SERIALIZER, RedisCluster::SERIALIZER_PHP);
         * $redisCluster->_unserialize('a:3:{i:0;i:1;i:1;i:2;i:2;i:3;}'); // Will return Array(1,2,3)
         * </pre>
         */
        public function _unserialize($value) { }
    
        /**
         * Return all redis master nodes
         *
         * @return array
         * @example
         * <pre>
         * $redisCluster->_masters(); // Will return [[0=>'127.0.0.1','6379'],[0=>'127.0.0.1','6380']]
         * </pre>
         */
        public function _masters() { }
    
        /**
         * Enter and exit transactional mode.
         *
         * @param int RedisCluster::MULTI|RedisCluster::PIPELINE
         *            Defaults to RedisCluster::MULTI.
         *            A RedisCluster::MULTI block of commands runs as a single transaction;
         *            a RedisCluster::PIPELINE block is simply transmitted faster to the server, but without any guarantee
         *            of atomicity. discard cancels a transaction.
         *
         * @return Redis returns the Redis instance and enters multi-mode.
         * Once in multi-mode, all subsequent method calls return the same object until exec() is called.
         * @link    http://redis.io/commands/multi
         * @example
         * <pre>
         * $ret = $redisCluster->multi()
         *      ->set('key1', 'val1')
         *      ->get('key1')
         *      ->set('key2', 'val2')
         *      ->get('key2')
         *      ->exec();
         *
         * //$ret == array (
         * //    0 => TRUE,
         * //    1 => 'val1',
         * //    2 => TRUE,
         * //    3 => 'val2');
         * </pre>
         */
        public function multi($mode = RedisCluster::MULTI) { }
    
        /**
         * @see     multi()
         * @return void|array
         * @link    http://redis.io/commands/exec
         */
        public function exec() { }
    
        /**
         * @see     multi()
         * @link    http://redis.io/commands/discard
         */
        public function discard() { }
    
        /**
         * Watches a key for modifications by another client. If the key is modified between WATCH and EXEC,
         * the MULTI/EXEC transaction will fail (return FALSE). unwatch cancels all the watching of all keys by this client.
         *
         * @param string | array $key : a list of keys
         *
         * @return void
         * @link    http://redis.io/commands/watch
         * @example
         * <pre>
         * $redisCluster->watch('x');
         * // long code here during the execution of which other clients could well modify `x`
         * $ret = $redisCluster->multi()
         *          ->incr('x')
         *          ->exec();
         * // $ret = FALSE if x has been modified between the call to WATCH and the call to EXEC.
         * </pre>
         */
        public function watch($key) { }
    
        /**
         * @see     watch()
         * @link    http://redis.io/commands/unwatch
         */
        public function unwatch() { }
    
        /**
         * Performs a synchronous save at a specific node.
         *
         * @param String | array $nodeParams key or [host,port]
         *
         * @return  bool:   TRUE in case of success, FALSE in case of failure.
         * If a save is already running, this command will fail and return FALSE.
         * @link    http://redis.io/commands/save
         * @example
         * $redisCluster->save('x'); //key
         * $redisCluster->save(['127.0.0.1',6379]); //[host,port]
         */
        public function save($nodeParams) { }
    
        /**
         * Performs a background save at a specific node.
         *
         * @param String | array $nodeParams key or [host,port]
         *
         * @return  bool:    TRUE in case of success, FALSE in case of failure.
         * If a save is already running, this command will fail and return FALSE.
         * @link    http://redis.io/commands/bgsave
         */
        public function bgsave($nodeParams) { }
    
        /**
         * Removes all entries from the current database at a specific node.
         *
         * @param String | array $nodeParams key or [host,port]
         *
         * @return  bool: Always TRUE.
         * @link    http://redis.io/commands/flushdb
         */
        public function flushDB($nodeParams) { }
    
        /**
         * Removes all entries from all databases at a specific node.
         *
         * @param String | array $nodeParams key or [host,port]
         *
         * @return  bool: Always TRUE.
         * @link    http://redis.io/commands/flushall
         */
        public function flushAll($nodeParams) { }
    
        /**
         * Returns the current database's size at a specific node.
         *
         * @param String | array $nodeParams key or [host,port]
         *
         * @return int:     DB size, in number of keys.
         * @link    http://redis.io/commands/dbsize
         * @example
         * <pre>
         * $count = $redisCluster->dbSize('x');
         * echo "Redis has $count keys\n";
         * </pre>
         */
        public function dbSize($nodeParams) { }
    
        /**
         * Starts the background rewrite of AOF (Append-Only File) at a specific node.
         *
         * @param String | array $nodeParams key or [host,port]
         *
         * @return  bool:   TRUE in case of success, FALSE in case of failure.
         * @link    http://redis.io/commands/bgrewriteaof
         * @example $redisCluster->bgrewriteaof('x');
         */
        public function bgrewriteaof($nodeParams) { }
    
        /**
         * Returns the timestamp of the last disk save at a specific node.
         *
         * @param String | array $nodeParams key or [host,port]
         *
         * @return  int:    timestamp.
         * @link    http://redis.io/commands/lastsave
         * @example $redisCluster->lastSave('x');
         */
        public function lastSave($nodeParams) { }
    
        /**
         * Returns an associative array of strings and integers
         *
         * @param   string $option Optional. The option to provide redis.
         *                         SERVER | CLIENTS | MEMORY | PERSISTENCE | STATS | REPLICATION | CPU | CLASTER | KEYSPACE
         *                         | COMANDSTATS
         *
         * Returns an associative array of strings and integers, with the following keys:
         * - redis_version
         * - redis_git_sha1
         * - redis_git_dirty
         * - arch_bits
         * - multiplexing_api
         * - process_id
         * - uptime_in_seconds
         * - uptime_in_days
         * - lru_clock
         * - used_cpu_sys
         * - used_cpu_user
         * - used_cpu_sys_children
         * - used_cpu_user_children
         * - connected_clients
         * - connected_slaves
         * - client_longest_output_list
         * - client_biggest_input_buf
         * - blocked_clients
         * - used_memory
         * - used_memory_human
         * - used_memory_peak
         * - used_memory_peak_human
         * - mem_fragmentation_ratio
         * - mem_allocator
         * - loading
         * - aof_enabled
         * - changes_since_last_save
         * - bgsave_in_progress
         * - last_save_time
         * - total_connections_received
         * - total_commands_processed
         * - expired_keys
         * - evicted_keys
         * - keyspace_hits
         * - keyspace_misses
         * - hash_max_zipmap_entries
         * - hash_max_zipmap_value
         * - pubsub_channels
         * - pubsub_patterns
         * - latest_fork_usec
         * - vm_enabled
         * - role
         *
         * @link    http://redis.io/commands/info
         * @return string
         * @example
         * <pre>
         * $redisCluster->info();
         *
         * or
         *
         * $redisCluster->info("COMMANDSTATS"); //Information on the commands that have been run (>=2.6 only)
         * $redisCluster->info("CPU"); // just CPU information from Redis INFO
         * </pre>
         */
        public function info($option = null) { }
    
        /**
         * @since  redis >= 2.8.12.
         *  Returns the role of the instance in the context of replication
         *
         * @param String | array $nodeParams key or [host,port]
         *
         * @return array
         * @link   http://redis.io/commands/role
         * @example
         * <pre>
         * $redisCluster->role(['127.0.0.1',6379]);
         * // [ 0=>'master',1 => 3129659, 2 => [ ['127.0.0.1','9001','3129242'], ['127.0.0.1','9002','3129543'] ] ]
         * </pre>
         */
        public function role($nodeParams) { }
    
        /**
         * Returns a random key at the specified node
         *
         * @param String | array $nodeParams key or [host,port]
         *
         * @return string: an existing key in redis.
         * @link    http://redis.io/commands/randomkey
         * @example
         * <pre>
         * $key = $redisCluster->randomKey('x');
         * $surprise = $redisCluster->get($key);  // who knows what's in there.
         * </pre>
         */
        public function randomKey($nodeParams) { }
    
        /**
         * Return the specified node server time.
         *
         * @param String | array $nodeParams key or [host,port]
         *
         * @return  array If successfully, the time will come back as an associative array with element zero being the
         * unix timestamp, and element one being microseconds.
         * @link    http://redis.io/commands/time
         * @example
         * <pre>
         * var_dump( $redisCluster->time('x') );
         *  Output:
         * //
         * // array(2) {
         * //   [0] => string(10) "1342364352"
         * //   [1] => string(6) "253002"
         * // }
         * </pre>
         */
        public function time($nodeParams) { }
    
        /**
         * Check the specified node status
         *
         * @param String | array $nodeParams key or [host,port]
         *
         * @return  string STRING: +PONG on success. Throws a RedisException object on connectivity error, as described
         *                 above.
         * @link    http://redis.io/commands/ping
         */
        public function ping($nodeParams) { }
    
        /**
         * Returns message.
         *
         * @param String | array $nodeParams key or [host,port]
         * @param  String        $msg
         *
         * @return mixed array | bool
         */
        public function echo ($nodeParams, $msg) { }
    
        /**
         * Returns Array reply of details about all Redis Cluster commands.
         *
         * @return mixed array | bool
         */
        public function command() { }
    
        /**
         * Send arbitrary things to the redis server at the specified node
         *
         * @param String | array $nodeParams key or [host,port]
         * @param String         $command    Required command to send to the server.
         * @param mixed          $arguments  Optional variable amount of arguments to send to the server.
         *
         * @return  mixed
         */
        public function rawCommand($nodeParams, $command, $arguments) { }
    
        /**
         * @since redis >= 3.0
         * Executes cluster command
         *
         * @param String | array $nodeParams key or [host,port]
         * @param string         $command    Required command to send to the server.
         * @param mixed          $arguments  Optional variable amount of arguments to send to the server.
         *
         * @return  mixed
         * @link  https://redis.io/commands#cluster
         * @example
         * <pre>
         * $redisCluster->cluster(['127.0.0.1',6379],'INFO');
         * </pre>
         */
        public function cluster($nodeParams, $command, $arguments) { }
    
        /**
         * Allows you to get information of the cluster client
         *
         * @param String | array $nodeParams key or [host,port]
         * @param                $subCmd     String  which can be: 'LIST', 'KILL', 'GETNAME', or 'SETNAME'
         * @param                $args       String optional arguments
         */
        public function client($nodeParams, $subCmd, $args) { }
    
        /**
         * Get or Set the redis config keys.
         *
         * @param String | array $nodeParams key or [host,port]
         * @param string         $operation  either `GET` or `SET`
         * @param string         $key        for `SET`, glob-pattern for `GET`. See http://redis.io/commands/config-get for examples.
         * @param string         $value      optional string (only for `SET`)
         *
         * @return  array   Associative array for `GET`, key -> value
         * @link    http://redis.io/commands/config-get
         * @link    http://redis.io/commands/config-set
         * @example
         * <pre>
         * $redisCluster->config(['127.0.0.1',6379], "GET", "*max-*-entries*");
         * $redisCluster->config(['127.0.0.1',6379], "SET", "dir", "/var/run/redis/dumps/");
         * </pre>
         */
        public function config($nodeParams, $operation, $key, $value) { }
    
        /**
         * A command allowing you to get information on the Redis pub/sub system.
         *
         * @param    string | array $nodeParams key or [host,port]
         *
         * @param    string         $keyword    String, which can be: "channels", "numsub", or "numpat"
         * @param    string | array $argument   Optional, variant.
         *                                      For the "channels" subcommand, you can pass a string pattern.
         *                                      For "numsub" an array of channel names
         *
         * @return    array | int                   Either an integer or an array.
         *                          - channels  Returns an array where the members are the matching channels.
         *                          - numsub    Returns a key/value array where the keys are channel names and
         *                                      values are their counts.
         *                          - numpat    Integer return containing the number active pattern subscriptions.
         * @link    http://redis.io/commands/pubsub
         * @example
         * <pre>
         * $redisCluster->pubsub(['127.0.0.1',6379], 'channels'); // All channels
         * $redisCluster->pubsub(['127.0.0.1',6379], 'channels', '*pattern*'); // Just channels matching your pattern
         * $redisCluster->pubsub(['127.0.0.1',6379], 'numsub', array('chan1', 'chan2')); // Get subscriber counts for
         * 'chan1' and 'chan2'
         * $redisCluster->pubsub(['127.0.0.1',6379], 'numpat'); // Get the number of pattern subscribers
         * </pre>
         */
        public function pubsub($nodeParams, $keyword, $argument) { }
    
        /**
         * Execute the Redis SCRIPT command to perform various operations on the scripting subsystem.
         *
         * @param   string | array $nodeParams key or [host,port]
         * @param   string         $command    load | flush | kill | exists
         * @param   string         $script
         *
         * @return  mixed
         * @link    http://redis.io/commands/script-load
         * @link    http://redis.io/commands/script-kill
         * @link    http://redis.io/commands/script-flush
         * @link    http://redis.io/commands/script-exists
         * @example
         * <pre>
         * $redisCluster->script(['127.0.0.1',6379], 'load', $script);
         * $redisCluster->script(['127.0.0.1',6379], 'flush');
         * $redisCluster->script(['127.0.0.1',6379], 'kill');
         * $redisCluster->script(['127.0.0.1',6379], 'exists', $script1, [$script2, $script3, ...]);
         * </pre>
         *
         * SCRIPT LOAD will return the SHA1 hash of the passed script on success, and FALSE on failure.
         * SCRIPT FLUSH should always return TRUE
         * SCRIPT KILL will return true if a script was able to be killed and false if not
         * SCRIPT EXISTS will return an array with TRUE or FALSE for each passed script
         */
        public function script($nodeParams, $command, $script) { }
    
        /**
         * This function is used in order to read and reset the Redis slow queries log.
         *
         * @param   string | array $nodeParams key or [host,port]
         * @param   string         $command
         * @param   mixed          $argument
         *
         * @link  https://redis.io/commands/slowlog
         * @example
         * <pre>
         * $redisCluster->slowLog(['127.0.0.1',6379],'get','2');
         * </pre>
         */
        public function slowLog($nodeParams, $command, $argument) { }
    
        /**
         * Add one or more geospatial items in the geospatial index represented using a sorted set
         *
         * @param string $key
         * @param float  $longitude
         * @param float  $latitude
         * @param string $member
         *
         * @link  https://redis.io/commands/geoadd
         * @example
         * <pre>
         * $redisCluster->geoAdd('Sicily', 13.361389, 38.115556, 'Palermo'); // int(1)
         * $redisCluster->geoAdd('Sicily', 15.087269, 37.502669, "Catania"); // int(1)
         * </pre>
         */
        public function geoAdd($key, $longitude, $latitude, $member) { }
    
        /**
         * Returns members of a geospatial index as standard geohash strings
         *
         * @param $key     string
         * @param $member1 string
         * @param $member2 string
         * @param $memberN string
         *
         * @example
         * <pre>
         * $redisCluster->geoAdd('Sicily', 13.361389, 38.115556, 'Palermo'); // int(1)
         * $redisCluster->geoAdd('Sicily', 15.087269, 37.502669, "Catania"); // int(1)
         * $redisCluster->geohash('Sicily','Palermo','Catania');//['sqc8b49rny0','sqdtr74hyu0']
         * </pre>
         */
        public function geohash($key, $member1, $member2 = null, $memberN = null) { }
    
        /**
         * Returns longitude and latitude of members of a geospatial index
         *
         * @param $key     string
         * @param $member1 string
         * @param $member2 string
         * @param $memberN string
         *
         * @example
         * <pre>
         * $redisCluster->geoAdd('Sicily', 15.087269, 37.502669, "Catania"); // int(1)
         * $redisCluster->geopos('Sicily','Palermo');//[['13.36138933897018433','38.11555639549629859']]
         * </pre>
         */
        public function geopos($key, $member1, $member2 = null, $memberN = null) { }
    
        /**
         *
         * Returns the distance between two members of a geospatial index
         *
         * @param    string $key
         * @param    string $member1
         * @param    string $member2
         * @param    string $unit The unit must be one of the following, and defaults to meters:
         *                        m for meters.
         *                        km for kilometers.
         *                        mi for miles.
         *                        ft for feet.
         *
         * @link https://redis.io/commands/geoadd
         * @example
         * <pre>
         * $redisCluster->geoAdd('Sicily', 13.361389, 38.115556, 'Palermo'); // int(1)
         * $redisCluster->geoAdd('Sicily', 15.087269, 37.502669, "Catania"); // int(1)
         * $redisCluster->geoDist('Sicily', 'Palermo' ,'Catania'); // float(166274.1516)
         * $redisCluster->geoDist('Sicily', 'Palermo','Catania', 'km'); // float(166.2742)
         * </pre>
         */
        public function geoDist($key, $member1, $member2, $unit = 'm') { }
    
        /**
         * Query a sorted set representing a geospatial index to fetch members matching a given maximum distance from a point
         *
         * @param    string $key
         * @param    float  $longitude
         * @param    float  $latitude
         * @param    float  $radius
         * @param    string $radiusUnit String can be: "m" for meters; "km" for kilometers , "mi" for miles, or "ft" for feet.
         * @param    array  $options
         *
         * @link  https://redis.io/commands/georadius
         * @example
         * <pre>
         * $redisCluster->del('Sicily');
         * $redisCluster->geoAdd('Sicily', 12.361389, 35.115556, 'Palermo'); // int(1)
         * $redisCluster->geoAdd('Sicily', 15.087269, 37.502669, "Catania"); // int(1)
         * $redisCluster->geoAdd('Sicily', 13.3585, 35.330022, "Agrigento"); // int(1)
         *
         * var_dump( $redisCluster->geoRadius('Sicily',13.3585, 35.330022, 300, 'km', ['WITHDIST' ,'DESC']) );
         *
         * array(3) {
         *    [0]=>
         *   array(2) {
         *        [0]=>
         *     string(7) "Catania"
         *        [1]=>
         *     string(8) "286.9362"
         *   }
         *   [1]=>
         *   array(2) {
         *        [0]=>
         *     string(7) "Palermo"
         *        [1]=>
         *     string(7) "93.6874"
         *   }
         *   [2]=>
         *   array(2) {
         *        [0]=>
         *     string(9) "Agrigento"
         *        [1]=>
         *     string(6) "0.0002"
         *   }
         * }
         * var_dump( $redisCluster->geoRadiusByMember('Sicily','Agrigento', 100, 'km', ['WITHDIST' ,'DESC']) );
         *
         * * array(2) {
         *    [0]=>
         *   array(2) {
         *        [0]=>
         *     string(7) "Palermo"
         *        [1]=>
         *     string(7) "93.6872"
         *   }
         *   [1]=>
         *   array(2) {
         *        [0]=>
         *     string(9) "Agrigento"
         *        [1]=>
         *     string(6) "0.0000"
         *   }
         * }
         *
         * <pre>
         */
        public function geoRadius($key, $longitude, $latitude, $radius, $radiusUnit, array $options) { }
    
        /**
         * Query a sorted set representing a geospatial index to fetch members matching a given maximum distance from a member
         *
         * @see geoRadius
         *
         * @param string $key
         * @param string $member
         * @param float  $radius
         * @param string $radiusUnit
         * @param array  $options
         */
        public function geoRadiusByMember($key, $member, $radius, $radiusUnit, array $options) { }
    
    }