Php/docs/mysqli.poll
mysqli::poll
mysqli_poll
(PHP 5 >= 5.3.0, PHP 7)
mysqli::poll -- mysqli_poll — Poll connections
Description
Object oriented style
public static mysqli::poll
( array &$read
, array &$error
, array &$reject
, int $sec
[, int $usec = 0
] ) : int
Procedural style
mysqli_poll
( array &$read
, array &$error
, array &$reject
, int $sec
[, int $usec = 0
] ) : int
Poll connections. Available only with mysqlnd. The method can be used as static.
Parameters
read- List of connections to check for outstanding results that can be read.
error- List of connections on which an error occurred, for example, query failure or lost connection.
reject- List of connections rejected because no asynchronous query has been run on for which the function could poll results.
sec- Maximum number of seconds to wait, must be non-negative.
usec- Maximum number of microseconds to wait, must be non-negative.
Return Values
Returns number of ready connections upon success, FALSE otherwise.
Examples
Example #1 A mysqli_poll() example
<?php$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
