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。
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。
$mysqli -> ping()
mysqli_ping(
connection)
Parameter | Description |
---|---|
connection | Required. Specifies the MySQL connection to use |
返回值: | 成功则为真。失败时为 FALSE |
---|---|
PHP 版本: | 5+ |
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);
?>
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