connect_errno

❮ PHP MySQLi 参考手册

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();
}
?>

查看底部的程序样式示例。

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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。

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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+

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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();
}
?>

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❮ PHP MySQLi 参考手册