(PHP 5 >= 5.3.0, PHP 7)
mysqli::poll -- mysqli_poll — Poll connections
Object oriented style
&$read
, array &$error
, array &$reject
, int $sec
[, int $usec
] )Procedural style
&$read
, array &$error
, array &$reject
, int $sec
[, int $usec
] )Poll connections. Available only with mysqlnd. The method can be used as static.
readList of connections to check for outstanding results that can be read.
errorList of connections on which an error occured, for example, query failure or lost connection.
rejectList of connections rejected because no asynchronous query has been run on for which the function could poll results.
secNumber of seconds to wait, must be non-negative.
usecNumber of microseconds to wait, must be non-negative.
Returns number of ready connections upon success, FALSE otherwise.
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));
?>
The above example will output:
Array
(
[0] => test
)