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mysqli::ping

mysqli_ping

(PHP 5)

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

Descrizione

Stile orientato agli oggetti

bool mysqli::ping ( void )

Stile procedurale

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.

Elenco dei parametri

link

Solo nello stile procedurale: un identificatore restituito da mysqli_connect() o mysqli_init()

Valori restituiti

Restituisce TRUE in caso di successo, FALSE in caso di fallimento.

Esempi

Example #1 mysqli::ping() example

Stile orientato agli oggetti

<?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();
?>

Stile procedurale

<?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);
?>

I precedenti esempi visualizzeranno:

Our connection is ok!
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