3v4l.org

run code in 300+ PHP versions simultaneously
<?php $it = strtotime('2013-10-08') + 7 * 24 * 3600; for($i=0; $i<=15; $i++) { echo date("Y-m-d H:i:s", $it + $i * 24 * 3600) . "\n"; }
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 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
2013-10-15 00:00:00 2013-10-16 00:00:00 2013-10-17 00:00:00 2013-10-18 00:00:00 2013-10-19 00:00:00 2013-10-20 00:00:00 2013-10-21 00:00:00 2013-10-22 00:00:00 2013-10-23 00:00:00 2013-10-24 00:00:00 2013-10-25 00:00:00 2013-10-26 00:00:00 2013-10-27 00:00:00 2013-10-27 23:00:00 2013-10-28 23:00:00 2013-10-29 23:00:00
Output for 7.3.32 - 7.3.33, 7.4.26, 8.0.13
2013-10-15 00:00:00 2013-10-16 00:00:00 2013-10-17 00:00:00 2013-10-18 00:00:00 2013-10-19 00:00:00 2013-10-20 00:00:00 2013-10-21 00:00:00 2013-10-22 00:00:00 2013-10-23 00:00:00 2013-10-24 00:00:00 2013-10-25 00:00:00 2013-10-26 00:00:00 2013-10-27 00:00:00 2013-10-28 00:00:00 2013-10-29 00:00:00 2013-10-30 00:00:00
preferences:
247.09 ms | 402 KiB | 384 Q