原生mysql查询,选择数据库,建立连接及查询数据表PHP完整流程

快来打我* 2021-09-26 12:52 500阅读 0赞

用mysqli\_connect,mysql\_connect,mysqli\_select\_db,mysql\_select\_db  
,mysqli\_query,mysql\_query直接选择数据库.数据表并进行查询完整代码

database.php文件为数据库的用户或密码等

<?php return array ( 'default' => array ( 'hostname' => '127.0.0.1', 'database' => 'phpcms', 'username' => 'root', 'password' => 'root', 'tablepre' => 'v9_', 'charset' => 'utf8', 'type' => 'mysql', 'debug' => true, 'pconnect' => 0, 'autoconnect' => 0 ), ); ?>

$mysql_user=include(PHPS_PATH.'/caches/configs/database.php');//得到数据库配置
            $username=$mysql_user['default']['username'];
            $password=$mysql_user['default']['password'];
            $tablepre=$mysql_user['default']['tablepre'];
            $database=$mysql_user['default']['database'];
    
            $con = mysqli_connect($mysql_user['default']['hostname'],$username,$password);//句柄
    
    mysqli_select_db($con,$database);//选择数据库 
    $sql = ' SELECT * FROM '.$tablepre."pay_account where trade_sn='".$out_trade_no."'";
    //file_put_contents('3.txt',$sql);
    $result2=mysqli_query($con,$sql);
    $orderinfo=mysqli_fetch_array($result2);;
    $uid=$orderinfo['userid'];
    //更新数据库
    $sql4 = ' update '.$tablepre."pay_account set status= 'succ' where userid=".$uid ." and trade_sn='".$out_trade_no."'";
            $result4=mysqli_query($con,$sql4);
                     mysqli_close($con);

![请打赏谢谢大佬][70]

[70]: /images/20210923/b15acf0ae14e424481b552fabdbe5651.png