目录

PHP mysqli ping() 函数

❮ PHP MySQLi 参考

示例 - 面向对象风格

Ping 服务器连接:

<?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();
}

// Check if server is alive
if ($mysqli -> ping()) {
  echo "Connection is ok!";
} else {
  echo "Error: ". $mysqli -> error;
}

$mysqli -> close();
?>

查看底部的程序样式示例。


定义和用法

ping() / mysqli_ping() 函数对服务器连接执行 ping 操作,以检查服务器是否处于活动状态。如果连接断开,它还会尝试重新连接。


语法

面向对象风格:

$mysqli -> ping()

程序风格:

mysqli_ping( connection)

参数值

Parameter Description
connection Required. Specifies the MySQL connection to use

技术细节

返回值: 成功则为真。失败时为 FALSE
PHP 版本: 5+

示例 - 程序风格

Ping 服务器连接:

<?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();
}

// Check if server is alive
if (mysqli_ping($con)) {
  echo "Connection is ok!";
} else {
  echo "Error: ". mysqli_error($con);
}

mysqli_close($con);
?>


❮ PHP MySQLi 参考