3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { public function foo(): bool {} } class B extends A { public function foo() {} }
Output for 7.1.25 - 7.1.28, 7.2.0 - 7.2.17, 7.3.0 - 7.3.4
Fatal error: Declaration of B::foo() must be compatible with A::foo(): bool in /in/4DKvY on line 13
Process exited with code 255.
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179.24 ms | 1008 KiB | 7 Q