DateUtils.class.php

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00001 <?php
00002 /***************************************************************************
00003  *   Copyright (C) 2007 by Ivan Y. Khvostishkov                            *
00004  *                                                                         *
00005  *   This program is free software; you can redistribute it and/or modify  *
00006  *   it under the terms of the GNU Lesser General Public License as        *
00007  *   published by the Free Software Foundation; either version 3 of the    *
00008  *   License, or (at your option) any later version.                       *
00009  *                                                                         *
00010  ***************************************************************************/
00011 /* $Id: DateUtils.class.php 4687 2007-12-09 18:57:18Z voxus $ */
00012 
00018     final class DateUtils extends StaticFactory
00019     {
00020         public static function getAgeByBirthDate(
00021             Date $birthDate, /* Date*/ $actualDate = null
00022         )
00023         {
00024             if ($actualDate)
00025                 Assert::isInstance($actualDate, 'Date');
00026             else
00027                 $actualDate = Date::makeToday();
00028             
00029             $result = $actualDate->getYear() - $birthDate->getYear();
00030             
00031             if (
00032                 $actualDate->getMonth() < $birthDate->getMonth()
00033                 || (
00034                     $actualDate->getMonth() == $birthDate->getMonth()
00035                     && $actualDate->getDay() < $birthDate->getDay()
00036                 )
00037             ) {
00038                     // - Happy birthday?
00039                     // - Happy go to hell. Not yet in this year.
00040                     --$result;
00041             }
00042             
00043             return $result;
00044         }
00045     }
00046 ?>

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