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<?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 {} }
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Fatal error: Declaration of TestInterfaceContravariance::foo(): A must be compatible with InterfaceTest::foo(): B in /in/pqI2n on line 16
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
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 5.4.2 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 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.
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