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# mysqli_ping

(PHP 5)

mysqli_ping

(no version information, might be only in CVS)

mysqli->ping -- Pings a server connection, or tries to reconnect if the connection has gone down

## Description

Procedural style:

bool mysqli_ping ( mysqli link )

Object oriented style (method):

class mysqli {
bool ping ( void )
}

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.

## Rückgabewerte

Gibt bei Erfolg `TRUE` zurück, im Fehlerfall `FALSE`.

## Beispiele

Beispiel 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(); ?>`

Beispiel 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); ?>`

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

    Our connection is ok!

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