3v4l.org

run code in 300+ PHP versions simultaneously
<?php $target_days = mktime(0,0,0,12,31,2013);// modify the birth day 12/31/2013 $today = time(); $diff_days = ($target_days - $today); $days = (int)($diff_days/86400); print "$today"; print "Days till next birthday: $days days!"; ?> - See more at: http://www.w3resource.com/php-exercises/php-date-exercises.php#sthash.xJA52BEw.dpuf
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.26, 7.3.0 - 7.3.13, 7.4.0 - 7.4.1
1412426682Days till next birthday: -277 days! - See more at: http://www.w3resource.com/php-exercises/php-date-exercises.php#sthash.xJA52BEw.dpuf

preferences:
207.48 ms | 405 KiB | 325 Q