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PHP mysqli_ping () function

PHP MySQLi Reference Manual PHP MySQLi Reference Manual

Detection server connection: 

<?php 
// 假定数据库用户名：root，密码：123456，数据库：w3big 
$con=mysqli_connect("localhost","root","123456","w3big"); 
if (mysqli_connect_errno($con)) 
{ 
    echo "连接 MySQL 失败: " . mysqli_connect_error(); 
} 

// 检测 MySQL 服务器是否可用
if (mysqli_ping($con))
{
	echo "连接正常!";
}
else
{
	echo "错误: ". mysqli_error($con);
}

mysqli_close($con);
?>

Definition and Usage

mysqli_ping () function a server connection, if the connection has been broken it attempts to reconnect.

grammar

mysqli_ping( connection ) ;

参数 描述
connection 必需。规定要使用的 MySQL 连接。

technical details

return value: If successful it returns TRUE, on failure returns FALSE.
PHP version: 5+

PHP MySQLi Reference Manual PHP MySQLi Reference Manual