PHP 使用mysql 与 mysqli 连接Mysql数据库

代码很简单直接上了

<?php

 

     /**

    * @Author:      HTL

    * @Email:       [email protected]

    * @DateTime:    2015-05-14 16:00:08

    * @Description: Description

    */

    // 降低PHP默认的错误级别

    // 只显示除禁用以外的所有错误

    // 解决因为PHP5.3+版本太高而导致在使用mysql_connect时出现的弃用警告“Deprecated: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead”

    error_reporting(E_ALL ^ E_DEPRECATED);

    $db_host="localhost";

    $db_user="root";

    $db_passwd="";

    $db_name="mysql";

    echo("<BR>---------------------------mysql_connect------------------------<BR><BR>");

    $query = "SELECT SESSION_USER(), CURRENT_USER(),now();";

    $conn = mysql_connect($db_host, $db_user,$db_passwd);

    if (!$conn)

    {

      die('Could not connect: ' . mysql_error());

    }

    mysql_select_db($db_name, $conn);

    $result = mysql_query($query);

    while($row = mysql_fetch_array($result)){

      var_dump($row);

    }

    mysql_close($conn);

    echo("<BR>---------------------------mysqli_connect------------------------<BR><BR>");

    $conn = mysqli_connect($db_host, $db_user, $db_passwd,$db_name) ; 

    if (!$conn)

    {

      die('Could not connect: ' . mysqli_error());

    }

    //execute the query. 

    $result = mysqli_query($conn, $query); 

    //display information: 

    while($row = mysqli_fetch_array($result)) {

        var_dump($row); 

    } 

    mysqli_close($conn);

    exit();

    

?>

 

有图有真相

 

参考：

解决Deprecated: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in

w3school PHP MySQL Select

PHP 手册 error_reporting

来自为知笔记(Wiz)