How to obtain php mysqli error information

In PHP, you can use the mysqli_error() function to return the last error description of the recently called function. The syntax is "mysqli_error(connection);". The parameter connection specifies the MySQL connection to be used.

The operating environment of this article: Windows 7 system, PHP version 7.1, DELL G3 computer

How to obtain the php mysqli error message?

mysqli_error() function returns the last error description of the most recently called function.

Syntax

mysqli_error(connection);

Parameters

connection required. Specifies the MySQL connection to use.

Return value: Returns a string with an error description. Returns "" if no error occurred.

Example

Return the last error description of the recently called function:

<?php 
// 假定数据库用户名：root，密码：123456，数据库：RUNOOB 
$con=mysqli_connect("localhost","root","123456","RUNOOB"); 
if (mysqli_connect_errno($con)) 
{ 
    echo "连接 MySQL 失败: " . mysqli_connect_error(); 
} 
// 执行查询，检查错误
if (!mysqli_query($con,"INSERT INTO websites (name) VALUES (&#39;菜鸟教程&#39;)"))
{
    echo("错误描述: " . mysqli_error($con));
}
mysqli_close($con);
?>

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