DateTime example

DateTimeExample.php

<?php 

/* 00:00am (midnight) in Vietnam */
$datetimeOne = new DateTime('2014-03-07 00:00:00+07:00');
/* 04:00am in Australia */
$datetimeTwo = new DateTime('2014-03-07 04:00:00+11:00');

echo ($datetimeOne == $datetimeTwo) ? 'equal' : 'not equal';
// prints 'equal'

/* just to prove it, let's check the unix timestamps: */
echo $datetimeOne->getTimestamp();
// prints '1394125200'
echo $datetimeTwo->getTimestamp();
// prints '1394125200'