3v4l.org

run code in 500+ PHP versions simultaneously
<?php class ParentReturn {} class ChildReturn {} class ParentClass { /** @return ParentReturn */ public function overridable() { return new ParentReturn(); } //public function nonOverridable(): ParentReturn { return new ParentReturn(); } } class ChildClass extends ParentClass { public function overridable(): ChildReturn { return new ChildReturn(); } //public function nonOverridable(): ChildReturn {return new ChildReturn();} }
Output for 7.1.0 - 7.1.33, 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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3

preferences:
95.14 ms | 1586 KiB | 4 Q