3v4l.org

run code in 300+ PHP versions simultaneously
<?php $d = date("2016-01-01 22:00:00"); var_dump($d); $dst = $d->format("Y-W"); var_dump($dst);
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
string(19) "2016-01-01 22:00:00" Fatal error: Uncaught Error: Call to a member function format() on string in /in/oTgfX:7 Stack trace: #0 {main} thrown in /in/oTgfX on line 7
Process exited with code 255.
Output for 5.6.0 - 5.6.40
string(19) "2016-01-01 22:00:00" Fatal error: Call to a member function format() on string in /in/oTgfX on line 7
Process exited with code 255.
Output for 5.5.0 - 5.5.38
string(19) "2016-01-01 22:00:00" Fatal error: Call to a member function format() on a non-object in /in/oTgfX on line 7
Process exited with code 255.

preferences:
252.21 ms | 401 KiB | 323 Q