--TEST--
Test date_add() function : basic functionality 
--CREDITS--
Felix De Vliegher <felix.devliegher@gmail.com>
--SKIPIF--
<?php if (!function_exists('date_add')) echo "skip: date_add() function not found!"; ?>
--FILE--
<?php
date_default_timezone_set('UTC');
/* Prototype  : void date_add(DateTime object, DateInterval interval)
 * Description: Adds an interval to the current date in object.
 * Source code: ext/date/php_date.c
 * Alias to functions: 
 */

echo "*** Testing date_add() : basic functionality ***\n";

// Initialise all required variables
$startDate = '2008-01-01 12:25';
$format = 'Y-m-d H:i:s';
$intervals = array(
	'P3Y6M4DT12H30M5S',
	'P0D',
	'P2DT1M',
	'P1Y2MT23H43M150S'
);

$d = new DateTime($startDate);
var_dump( $d->format($format) );

foreach($intervals as $interval) {
	date_add($d, new DateInterval($interval) );
	var_dump( $d->format($format) );
}

?>
===DONE===
--EXPECTF--
*** Testing date_add() : basic functionality ***
string(19) "2008-01-01 12:25:00"
string(19) "2011-07-06 00:55:05"
string(19) "2011-07-06 00:55:05"
string(19) "2011-07-08 00:56:05"
string(19) "2012-09-09 00:41:35"
===DONE===