3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(date('c', strtotime("first Friday")), date('c', strtotime("last Friday")));
Output for 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, 7.2.6 - 7.2.33, 7.3.0 - 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 - 8.2.18, 8.3.0 - 8.3.6
string(25) "2013-05-31T00:00:00+02:00" string(25) "2013-05-24T00:00:00+02:00"
Output for 7.3.32 - 7.3.33, 8.0.13
string(25) "2013-05-31T00:00:00+00:00" string(25) "2013-05-24T00:00:00+00:00"
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
string(1) "c" string(1) "c"

preferences:
265.45 ms | 402 KiB | 382 Q