MYSQLI_POLL(3)								 1							    MYSQLI_POLL(3)

mysqli::poll - Poll connections

       Object oriented style

SYNOPSIS

       publicstatic int mysqli::poll (array  &$read, array  &$error, array  &$reject, int  $sec, [int  $usec])

DESCRIPTION

       Procedural style
       int mysqli_poll (array  &$read, array  &$error, array  &$reject, int  $sec, [int  $usec])

	Poll connections. Available only with mysqlnd. The method can be used as static.

PARAMETERS

	      o $read
		- List of connections to check for outstanding results that can be read.

	      o $error
		- List of connections on which an error occured, for example, query failure or lost connection.

	      o $reject
		- List of connections rejected because no asynchronous query has been run on for which the function could poll results.

	      o $sec
		- Number of seconds to wait, must be non-negative.

	      o $usec
		- 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(3) 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(3), mysqli_reap_async_query(3).

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