3v4l.org

run code in 300+ PHP versions simultaneously
<?php $newDate = date("d-m-Y", strtotime("2014-01-01")); $day = date('l', strtotime($newDate)); echo $newDate;echo "-----";echo $day;exit;
Output for 5.1.3 - 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 - 7.1.20, 7.2.5 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
01-01-2014-----Wednesday
Output for 5.1.0 - 5.1.2
01-01-2014-----Thursday
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5
01-01-2014-----Friday
preferences:
238.42 ms | 402 KiB | 357 Q