3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo date("M-d-Y-W", mktime(0, 0, 0, 01, 01, 2016)); echo " - "; echo strftime("%W", mktime(0, 0, 0, 01, 01, 2016));
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Jan-01-2016-53 - Deprecated: Function strftime() is deprecated in /in/vjlvj on line 7 00
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
Jan-01-2016-53 - 00
preferences:
159.98 ms | 403 KiB | 241 Q