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<?php $d = date("2016-01-01 22:00:00"); var_dump($d); $dst = $d->format("Y-W"); var_dump($dst);
based on rt2SB
Output for 7.0.0 - 7.2.0
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 - 5.6.24
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.