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run code in 300+ PHP versions simultaneously
<?php abstract class A{ abstract function xxx(); //: mixed /** other stuff */ } abstract class B extends A{ abstract function xxx(): stdClass; /** other stuff */ } class C extends B{ abstract function xxx(): stdClass{ return new stdClass(); } }
Output for 7.0.0 - 7.0.16, 7.1.0 - 7.1.2
Fatal error: Can't inherit abstract function A::xxx() (previously declared abstract in B) in /in/XFgHP on line 11
Process exited with code 255.
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