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run code in 200+ php & hhvm versions
Bugs & Features
<?php interface Foo {} class Bar {} class Qux implements Foo {} $bars = [new Bar(), new Bar()]; $quxs = [new Qux(), new Qux()]; usort($bars, function(Foo $a, Foo $b) { return 0; }); var_dump($bars);
based on YU6Qo
Output for 7.0.0 - 7.2.0
Fatal error: Uncaught TypeError: Argument 1 passed to {closure}() must implement interface Foo, instance of Bar given in /in/KAZtp:12 Stack trace: #0 [internal function]: {closure}(Object(Bar), Object(Bar)) #1 /in/KAZtp(12): usort(Array, Object(Closure)) #2 {main} thrown in /in/KAZtp on line 12
Process exited with code 255.
Output for 5.4.10 - 5.6.28
Catchable fatal error: Argument 1 passed to {closure}() must implement interface Foo, instance of Bar given in /in/KAZtp on line 12
Process exited with code 255.
Output for 5.3.20 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/KAZtp on line 9
Process exited with code 255.