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run code in 200+ php & hhvm versions
Bugs & Features
<?php declare(strict_types=1); class A {} class B extends A {} class C extends B {} interface InterfaceTest { public function foo(): B; } abstract class AbstractTest { public abstract function foo(): B; } class TestInterfaceContravariance implements InterfaceTest { public function foo(): A {} } class TestInterfaceCovariance implements InterfaceTest { public function foo(): C {} }
based on 01dH3
Output for 7.0.0 - 7.3.1
Fatal error: Declaration of TestInterfaceContravariance::foo(): A must be compatible with InterfaceTest::foo(): B in /in/pqI2n on line 14
Process exited with code 255.
Output for 5.3.18 - 5.6.28
Warning: Unsupported declare 'strict_types' in /in/pqI2n on line 3 Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/pqI2n on line 9
Process exited with code 255.