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mysqli_ping
Manuál PHP
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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

Popis

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.

Seznam parametrů

link

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

Návratové hodnoty

Vrací TRUE při úspěchu, FALSE při selhání.

Příklady

Příklad 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();
?>

Příklad 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);
?>

Výše uvedený příklad vypíše:

Our connection is ok!
PředcházejícíDomůDalší
mysqli_param_countNahoru