3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface A {} class AA implements A {} class B { public function a(A $a); } class C extends B { public function a(AA $a); }
Output for 5.3.0 - 5.3.13, 5.4.0 - 5.4.3
Fatal error: Non-abstract method B::a() must contain body in /in/o02eU on line 8
Process exited with code 255.
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172.38 ms | 1395 KiB | 25 Q