MySQL and PHP
Copyright 1997-2021 the PHP Documentation Group.
mysqli::poll
mysqli_poll
Poll connections
Object oriented style
public static int mysqli::poll(array read,
array error,
array reject,
int sec,
int usec= =0);Procedural style
int mysqli_poll(array read,
array error,
array reject,
int sec,
int usec= =0);Poll connections. Available only with mysqlnd. The method can be used as static.
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.
sec
Maximum number of seconds to wait, must be non-negative.
usec
Maximum number of microseconds to wait, must be non-negative.
Returns number of ready connections upon success,
false otherwise.
Example 3.58 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
)
mysqli_query
|
mysqli_reap_async_query
|