Online PHP editor | output for 3hLYQ

@ 2016-01-04T11:22:03Z

<?php
$date = new \DateTime('2015-05-24 00:00:00');
$time = new \DateTime('0000-00-00 21:22:00');

$pickUpDateTime = new \DateTime();
 $pickUpDateTime->setDate($date->format('Y'), $date->format('m'), $date->format('d'));
 $pickUpDateTime->setTime($time->format('H'), $time->format('i'), $time->format('s'));
 
$now = new DateTime("now");

$interval = date_diff($now, $pickUpDateTime);
if ( $v = $interval->h >= 1 ) 
echo $interval->h ;

Output for 5.6.28, 7.0.6 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7: 15
Output for 5.5.28, 5.6.15, 7.3.32 - 7.3.33, 8.0.13: 14
Output for 5.5.29, 5.5.33, 5.6.12, 5.6.20, 7.0.5: 11
Output for 7.0.4
Output for 5.6.9, 7.0.3: 1
Output for 5.5.31, 7.0.2: 7
Output for 7.0.1: 10
Output for 5.5.24, 7.0.0: 12
Output for 5.6.21: 18
Output for 5.6.19: 8
Output for 5.6.11, 5.6.18: 17
Output for 5.5.35, 5.6.17: 4
Output for 5.5.34, 5.6.16: 13
Output for 5.6.13 - 5.6.14: 20
Output for 5.6.10: 19
Output for 5.6.8: 9
Output for 5.5.32: 21
Output for 5.5.27, 5.5.30: 16
Output for 5.5.26: 22
Output for 5.5.25: 5

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