Online PHP editor | output for XobH1

@ 2014-10-06T01:54:26Z

<?php
$start = "20141001T06:07:00";
$end = "20141007T06:07:00";

$date = new DateTime("Wed Oct 22 2014 05:30:00 GMT+0530 (IST)");

echo $date->format('Ymd H:i:s');

//$start = date_create(date('Y-m-d H:i:s', strtotime($start)));
//$end = date_create(date('Y-m-d H:i:s', strtotime($end)));

$start = new DateTime($start);
$end = new DateTime($end);

$interval = $start->diff($end);

$j = $interval->format('%a');
//echo $j;

for($i=0; $i < $interval->format('%a'); $i++){

//echo $start->format('Ymd#');
$start = $start->add(new DateInterval('P1D'));
}


//echo $interval->format('%R%a days');

Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: 20141022 05:30:00
Output for 5.2.0 - 5.2.17: 20141022 05:30:00 Fatal error: Call to undefined method DateTime::diff() in /in/XobH1 on line 15
Process exited with code 255.
Output for 5.0.0 - 5.0.5, 5.1.1 - 5.1.6: Fatal error: Class 'DateTime' not found in /in/XobH1 on line 5
Process exited with code 255.
Output for 5.1.0: Fatal error: fatal flex scanner internal error--end of buffer missed in /in/XobH1 on line 27
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9: Fatal error: Cannot instantiate non-existent class: datetime in /in/XobH1 on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1: Fatal error: Cannot instantiate non-existent class: datetime in /in/XobH1 on line 5

preferences:dark modelive preview