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mysqli::poll
mysqli_poll
(PHP 5 >= 5.3.0, PHP 7)
mysqli::poll -- mysqli_poll — Poll connections
Description
Object oriented style
&$read
, array &$error
, array &$reject
, int $sec
[, int $usec
= 0
] ) : intProcedural style
&$read
, array &$error
, array &$reject
, int $sec
[, int $usec
= 0
] ) : intPoll connections. Available only with mysqlnd. The method can be used as static.
Parameters
-
read
-
List of connections to check for outstanding results that can be read.
-
error
-
List of connections on which an error occured, 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.
Examples
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 )
See Also
- mysqli_query() - Performs a query on the database
- mysqli_reap_async_query() - Get result from async query
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