Swoole内存-table详解

以你之姓@ 2023-10-06 18:57 59阅读 0赞

#### Swoole内存-table详解 ####

*  前言
 *  创建内存表
 *  增删查操作

## 前言 ##

高性能共享内存 Table

由于 PHP 语言不支持多线程，因此 Swoole 使用多进程模式，在多进程模式下存在进程内存隔离，在工作进程内修改 global 全局变量和超全局变量时，在其他进程是无效的。

## 创建内存表 ##

[root@bogon swoole]# php swoole_table.php 
    Array
    (
        [id] => 1
        [name] => willem
        [age] => 29
    )

## 增删查操作 ##

<?php
    //创建内存表(1204行)
    $table = new swoole_table(1204);
    //内存表增加一行（创建字段）
    $table->column('id',$table::TYPE_INT,8);
    $table->column('name',$table::TYPE_STRING,64);
    $table->column('age',$table::TYPE_INT,3);
    $table->create();
    
    /*
    新增一行内容
    第一个参数是key，第二个参数内容
    */
    $table->set('willem_swoole',['id'=>1,'name'=>'willem','age'=>29]);
    //另一种方案
    $table['willem_swoole2']=[
        'id'=>2,
        'name'=>'willem2',
        'age'=>29,
    ];
    //第一种
    // print_r($table->get('willem_swoole2'));
    
    /*运行
    //第二种
    print_r($table['willem_swoole2']);
    
    [root@localhost memory]# php table.php 
    Swoole\Table\Row Object
    (
        [key] => willem_swoole2
        [value] => Array
            (
                [id] => 2
                [name] => willem2
                [age] => 29
            )
    
    )
    [root@localhost memory]# 
    
    //操作字段
    $table->incr('willem_swoole2','age',2);//加2
    print_r($table['willem_swoole2']);
    
    [root@localhost memory]# php table.php 
    Swoole\Table\Row Object
    (
        [key] => willem_swoole2
        [value] => Array
            (
                [id] => 2
                [name] => willem2
                [age] => 31
            )
    
    )
    
    $table->decr('willem_swoole2','age',2);//减2
    
    
    //删除操作
    $table->decr('willem_swoole2','age',2);//加2
    print_r($table['willem_swoole2']);
    echo "delete start:".PHP_EOL;
    $table->del('willem_swoole2');
    print_r($table['willem_swoole2']);
    
    [root@localhost memory]# php table.php 
    Swoole\Table\Row Object
    (
        [key] => willem_swoole2
        [value] => Array
            (
                [id] => 2
                [name] => willem2
                [age] => 27
            )
    
    )
    delete start:
    Swoole\Table\Row Object
    (
        [key] => willem_swoole2
        [value] => Array
            (
            )
    
    )
    [root@localhost memory]# 
    
    */
    //删除操作
    $table->decr('willem_swoole2','age',2);//加2
    print_r($table['willem_swoole2']);
    echo "delete start:".PHP_EOL;
    $table->del('willem_swoole2');
    print_r($table['willem_swoole2']);