poll

mysqli::poll

mysqli_poll

Poll connections

ENTITY

ENTITY

ENTITY

int

false

mysqli_poll

array

null

array

null

array

int

seconds

int

microseconds

0

Poll connections. The method can be used as static.

[!NOTE] ENTITY

ENTITY

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 pending asynchronous query exists to poll.

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

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

ENTITY

Returns number of ready connections upon success, ENTITY otherwise.

ENTITY

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

ENTITY

ENTITY

<?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));
?>

    

Array
(
    [0] => test
)

ENTITY

mysqli_query, mysqli_reap_async_query