Php/func mysqli connect errno

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PHP mysqli connect_errno()函数

MySQL PHP MySQLi参考

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();
}

?>



MySQL PHP MySQLi参考