PHP-Handbuch: Poll connections

Beschreibung

Objektorientierter Stil

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

Prozeduraler Stil

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

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: Number of seconds to wait, must be non-negative.
usec: 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

mysqli_query
mysqli_reap_async_query