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<?php interface TestInterface { public function test($value = null); } class TestClass implements TestInterface { public function test($value) { return $value; } } var_dump((new TestClass)->test());
Output for 8.5.0 - 8.5.3
Fatal error: Declaration of TestClass::test($value) must be compatible with TestInterface::test($value = null) in /in/L94uR on line 8 Stack trace: #0 {main}
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18
Fatal error: Declaration of TestClass::test($value) must be compatible with TestInterface::test($value = null) in /in/L94uR on line 8
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Fatal error: Declaration of TestClass::test($value) must be compatible with TestInterface::test($value = NULL) in /in/L94uR on line 8
Process exited with code 255.
Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33
Fatal error: Declaration of TestClass::test($value) must be compatible with TestInterface::test($value = NULL) in /in/L94uR on line 7
Process exited with code 255.
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