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<?php interface Contract { const PASSWORD_RESET = 'passwords.reset'; public function reset(): void; } class A implements Contract { public function reset(): void { echo static::PASSWORD_RESET, "\n"; } } class B extends A { const PASSWORD_RESET = 'foobar'; } (new A())->reset(); (new B())->reset();
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
passwords.reset foobar
Output for 7.0.0 - 7.0.33
passwords.reset Fatal error: Uncaught TypeError: Return value of A::reset() must be an instance of void, none returned in /in/YjLvn:15 Stack trace: #0 /in/YjLvn(22): A->reset() #1 {main} thrown in /in/YjLvn on line 15
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/YjLvn on line 6
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected ':', expecting '{' or ';' in /in/YjLvn on line 6
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING in /in/YjLvn on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING in /in/YjLvn on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/YjLvn on line 3
Process exited with code 255.

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