mysqli::poll
mysqli_poll
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
mysqli::poll -- mysqli_poll — Poll connections
Beschreibung
Objektorientierter Stil
?array
&$read,?array
&$error,array
&$reject,int
$seconds,int
$microseconds = 0): int|false
Prozeduraler Stil
?array
&$read,?array
&$error,array
&$reject,int
$seconds,int
$microseconds = 0): int|false
Poll connections. The method can be used as static.
Hinweis:
Nur in mysqlnd verfügbar.
Parameter-Liste
-
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.
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() - Performs a query on the database
- mysqli_reap_async_query() - Get result from async query
