mysqli::poll

mysqli_poll

(PHP 5 >= 5.3.0, PHP 7)

mysqli::poll -- mysqli_poll — Poll connections

Beschreibung

Objektorientierter Stil

public static mysqli::poll ( array &$read , array &$error , array &$reject , int $sec [, int $usec = 0 ] ) : int

Prozeduraler Stil

mysqli_poll ( array &$read , array &$error , array &$reject , int $sec [, int $usec = 0 ] ) : int

Poll connections. Nur in mysqlnd verfügbar. The method can be used as static.

Parameter-Liste

read

List of connections to check for outstanding results that can be read.

error

List of connections on which an error occured, for example, query failure or lost connection.

reject

List of connections rejected because no asynchronous query has been run on for which the function could poll results.

sec

Maximum number of seconds to wait, must be non-negative.

usec

Maximum number of microseconds to wait, must be non-negative.

Rückgabewerte

Returns number of ready connections upon success, FALSE otherwise.

Beispiele

Beispiel #1 A mysqli_poll() example

<?php
$link1 = mysqli_connect();
$link1->query("SELECT 'test'", MYSQLI_ASYNC);
$all_links = array($link1);
$processed = 0;
do {
    $links = $errors = $reject = array();
    foreach ($all_links as $link) {
        $links[] = $errors[] = $reject[] = $link;
    }
    if (!mysqli_poll($links, $errors, $reject, 1)) {
        continue;
    }
    foreach ($links as $link) {
        if ($result = $link->reap_async_query()) {
            print_r($result->fetch_row());
            if (is_object($result))
                mysqli_free_result($result);
        } else die(sprintf("MySQLi Error: %s", mysqli_error($link)));
        $processed++;
    }
} while ($processed < count($all_links));
?>

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

Array
(
    [0] => test
)

Siehe auch