Php/func mysqli connect errno
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PHP mysqli connect_errno()函数
示例-面向对象的样式
返回上一个连接错误的错误代码(如果有):
<?php $mysqli = new mysqli("localhost","my_user","my_password","my_db"); // Check connection if ($mysqli -> connect_errno) { echo "Failed to connect to MySQL: " . $mysqli -> connect_error; exit(); } ?>
在底部查看程序样式的示例。
定义和用法
connect_errno / mysqli_connect_errno()函数返回上次连接错误(如果有)的错误代码。
句法
面向对象的样式:
$mysqli -> connect_errno
程序风格:
mysqli_connect_errno()
技术细节
返回值: | 返回错误代码值。如果没有发生错误,则为零 |
PHP版本: | 5+ |
示例-程序风格
返回上一个连接错误的错误代码(如果有):
<?php $con = mysqli_connect("localhost","my_user","my_password","my_db"); // Check connection if (mysqli_connect_errno()) { echo "Failed to connect to MySQL: " . mysqli_connect_error(); exit(); } ?>