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run code in 300+ PHP versions simultaneously
<?php class ParentClass {} class Child extends ParentClass { public function foo(): ParentClass { return new parent(); } } var_dump((new Child())->foo());
Output for 7.4.0 - 7.4.33, 8.0.1 - 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
object(ParentClass)#2 (0) { }

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98.41 ms | 1243 KiB | 4 Q