PHP中mysqli的MYSQLI_OPT_CONNECT_TIMEOUT常量用法

  MYSQLI_OPT_CONNECT_TIMEOUT 常量用于设置连接数据库的超时时间，单位为秒。

参考如下示例：

<?php

$con=mysqli_init();

if (!$con)

{

die("mysqli_init failed");

}

 

mysqli_options($con, MYSQLI_OPT_CONNECT_TIMEOUT,5);

 

if (!mysqli_real_connect($con,"localhost","my_user","my_password","my_db"))

{

       die("连接错误: " . mysqli_connect_error());

}

 

mysqli_close($con);

?>