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3.9.38. mysqli::poll, mysqli_poll

Copyright 1997-2012 the PHP Documentation Group.

  • mysqli::poll

    mysqli_poll

    Poll connections

Description

Object oriented style

public int mysqli::poll(array read,
                        array error,
                        array reject,
                        int sec,
                        int usec);

Procedural style

int mysqli_poll(array read,
                array error,
                array reject,
                int sec,
                int usec);
Warning

This function is currently not documented; only its argument list is available.

Poll connections. Available only with mysqlnd. The method can be used as static.

Parameters

read

error

reject

sec

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

usec

Number of microseconds to wait, must be non-negative.

Return Values

Returns number of ready connections upon success, FALSE otherwise.

Examples

Example 3.59. 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));
?>

The above example will output: 

Array
(
    [0] => test
)

See Also

mysqli_query
mysqli_reap_async_query
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