目录

PHP mysqli connect_errno() 函数

❮ PHP MySQLi 参考

示例 - 面向对象风格

返回上次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();
}
?>

查看底部的程序样式示例。


定义和用法

connect_errno / mysqli_connect_errno() 函数返回上次连接错误的错误代码(如果有)。


语法

面向对象风格:

$mysqli -> connect_errno

程序风格:

mysqli_connect_errno()

技术细节

返回值: 返回错误代码值。如果没有发生错误则为零
PHP 版本: 5+

示例 - 程序风格

返回上次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();
}
?>


❮ PHP MySQLi 参考