mysqli::poll

mysqli_poll

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

mysqli::poll -- mysqli_pollPoll connections

Descrizione

Stile orientato agli oggetti

public static mysqli::poll(
    ?array &$read,
    ?array &$error,
    array &$reject,
    int $seconds,
    int $microseconds = 0
): int|false

Stile procedurale

mysqli_poll(
    ?array &$read,
    ?array &$error,
    array &$reject,
    int $seconds,
    int $microseconds = 0
): int|false

Poll connections. The method can be used as static.

Nota:

Disponibile solo con mysqlnd.

Elenco dei parametri

read

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

error

List of connections on which an error occurred, 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.

seconds

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

microseconds

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

Valori restituiti

Returns number of ready connections upon success, false otherwise.

Errori/Eccezioni

A ValueError is thrown when neither the read nor error arguments are passed.

Log delle modifiche

Versione Descrizione
8.3.0 Now throws a ValueError exception when neither the read nor error arguments are passed.

Esempi

Example #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));
?>

Il precedente esempio visualizzerà:

Array
(
    [0] => test
)

Vedere anche: