Online PHP editor | output for F5gGY

@ 2015-09-29T15:51:15Z

<?php

class A {}
class B extends A {}
class C extends B {}

interface InterfaceTest { public function foo(B $p); }
abstract class AbstractTest {
  public abstract function foo(B $p);
}

// class TestAbstractContravariance extends AbstractTest {
//  public function foo(A $p) {}
// }
//class TestAbstractCovariance extends AbstractTest {
//  public function foo(C $p) {}
//}
//class TestInterfaceContravariance implements InterfaceTest
// {
//  public function foo(A $p) {}
//}
class TestInterfaceCovariance implements InterfaceTest {
  public function foo(C $p) {}
}

Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: Fatal error: Declaration of TestInterfaceCovariance::foo(C $p) must be compatible with InterfaceTest::foo(B $p) in /in/F5gGY on line 23
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33: Fatal error: Declaration of TestInterfaceCovariance::foo(C $p) must be compatible with InterfaceTest::foo(B $p) in /in/F5gGY on line 22
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: Fatal error: Declaration of TestInterfaceCovariance::foo() must be compatible with InterfaceTest::foo(B $p) in /in/F5gGY on line 22
Process exited with code 255.

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