PHP mysqli connect_errno() 函数
示例 - 面向对象的样式
返回上一次连接错误的错误代码：
<?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();
}
?>
$mysqli = new mysqli("localhost","my_user","my_password","my_db");
// Check connection
if ($mysqli -> connect_errno) {
echo "Failed to connect to MySQL: " . $mysqli -> connect_error;
exit();
}
?>
查看底部的程序样式示例。
定义和用法
connect_errno / mysqli_connect_errno() 函数返回上一次连接错误的错误代码。
语法
面向对象的风格：
$mysqli -> connect_errno
程序风格：
mysqli_connect_errno()
技术细节
| 返回值: | 返回错误代码值，如果没有错误发生则返回 0。 |
|---|---|
| PHP 版本: | 5+ |
示例 - 程序样式
返回上一次连接错误的错误代码：
<?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();
}
?>
$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();
}
?>
