mysqli::ping

mysqli_ping

(PHP 5)

mysqli_ping — Pings a server connection, or tries to reconnect if the connection has gone down

Description

Object oriented style (method):

bool mysqli::ping ( void )

Procedural style:

bool mysqli_ping ( mysqli $link )

Checks whether the connection to the server is working. If it has gone down, and global option mysqli.reconnect is enabled an automatic reconnection is attempted.

This function can be used by clients that remain idle for a long while, to check whether the server has closed the connection and reconnect if necessary.

Parameters

link: Procedural style only: A link identifier returned by mysqli_connect() or mysqli_init()

Return Values

Returns TRUE on success or FALSE on failure.

Examples

Example #1 Object oriented style


<?php

$mysqli = new mysqli("localhost", "my_user", "my_password", "world");



/* check connection */

if (mysqli_connect_errno()) {

    printf("Connect failed: %s\n", mysqli_connect_error());

    exit();

}



/* check if server is alive */

if ($mysqli->ping()) {

    printf ("Our connection is ok!\n");

} else {

    printf ("Error: %s\n", $mysqli->error);

}



/* close connection */

$mysqli->close();

?>

Example #2 Procedural style


<?php

$link = mysqli_connect("localhost", "my_user", "my_password", "world");



/* check connection */

if (mysqli_connect_errno()) {

    printf("Connect failed: %s\n", mysqli_connect_error());

    exit();

}



/* check if server is alive */

if (mysqli_ping($link)) {

    printf ("Our connection is ok!\n");

} else {

    printf ("Error: %s\n", mysqli_error($link));

}



/* close connection */

mysqli_close($link);

?>

The above example will output:

Our connection is ok!