PHP Unconference Europe 2015

mysqli::ping

mysqli_ping

(PHP 5)

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

Descrierea

Stil obiect-orientat

bool mysqli::ping ( void )

Stil procedural

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.

Parametri

link

Numai stilul procedural: Un identificator al legăturii întors de mysqli_connect() sau mysqli_init()

Valorile întoarse

Întoarce valoarea TRUE în cazul succesului sau FALSE în cazul eșecului.

Exemple

Example #1 mysqli::ping() example

Stil obiect-orientat

<?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();
?>

Stil procedural

<?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);
?>

Exemplele de mai sus vor afișa:

Our connection is ok!
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User Contributed Notes 1 note

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jay at grooveshark dot com
1 month ago
This does not work with mysqlnd and is marked as wontfix: https://bugs.php.net/bug.php?id=52561
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