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

在php5.3环境下，写了一个脚本，放到php5.6环境中直接错误：Deprecated: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead，意思是说要用mysqli或者PDO来替代mysql_*,mysql_*将在未来弃用。

解决方法1：

<?php
$connect = mysql_connect('localhost', 'user', 'password');
mysql_select_db('dbname', $connect);
//换用mysqi
<?php
$link = mysqli_connect('localhost', 'user', 'password', 'dbname');

<?php
mysql_query('select * from tablename', $connect);
// 换用mysqli
mysqli_query($connect, 'select * from tablename');

解决方法2：

在php程序代码里面(或在服务器php配置文件中)设置报警级别

<?php
error_reporting(E_ALL ^ E_DEPRECATED);

Deprecated的问题到此已解决。