3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Baz{} class BazChild extends Baz{} abstract class A{ abstract function test(): Baz; } abstract class B extends A{ /** @return BazChild */ abstract function test(): Baz; }
Output for 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33
Fatal error: Can't inherit abstract function A::test() (previously declared abstract in B) in /in/86kNc on line 13
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/86kNc on line 7
Process exited with code 255.
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115.05 ms | 408 KiB | 5 Q