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PHP Script  |  2008-07-02  |  1.9 KB  |  48 lines
  1. <?php
  2. // +----------------------------------------------------------------------+
  3. // | PHP Version 4                                                        |
  4. // +----------------------------------------------------------------------+
  5. // | Copyright (c) 1997-2004 The PHP Group                                |
  6. // +----------------------------------------------------------------------+
  7. // | This source file is subject to version 3.0 of the PHP license,       |
  8. // | that is bundled with this package in the file LICENSE, and is        |
  9. // | available at through the world-wide-web at                           |
  10. // | http://www.php.net/license/3_0.txt.                                  |
  11. // | If you did not receive a copy of the PHP license and are unable to   |
  12. // | obtain it through the world-wide-web, please send a note to          |
  13. // | license@php.net so we can mail you a copy immediately.               |
  14. // +----------------------------------------------------------------------+
  15. // | Authors: Arpad Ray <arpad@php.net>                                   |
  16. // +----------------------------------------------------------------------+
  17. //
  18. // $Id: time_sleep_until.php,v 1.2 2005/12/07 21:08:57 aidan Exp $
  19.  
  20.  
  21. /**
  22.  * Replace time_sleep_until()
  23.  *
  24.  * @category    PHP
  25.  * @package     PHP_Compat
  26.  * @link        http://php.net/time_sleep_until
  27.  * @author      Arpad Ray <arpad@php.net>
  28.  * @version     $Revision: 1.2 $
  29.  * @since       PHP 5.1.0
  30.  * @require     PHP 4.0.1 (trigger_error)
  31.  */
  32. if (!function_exists('time_sleep_until')) {
  33.     function time_sleep_until($timestamp)
  34.     {
  35.         list($usec, $sec) = explode(' ', microtime());
  36.         $now = $sec + $usec;
  37.         if ($timestamp <= $now) {
  38.             user_error('Specified timestamp is in the past', E_USER_WARNING);
  39.             return false;
  40.         }
  41.  
  42.         $diff = $timestamp - $now;
  43.         usleep($diff * 1000000);
  44.         return true;
  45.     }
  46. }
  47.     
  48. ?>