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<?php abstract class A { abstract function foo($a, $b = 0); } class B extends A { function foo($a){} }
Output for 7.0.0 - 7.0.19, 7.1.0 - 7.1.5
Fatal error: Declaration of B::foo($a) must be compatible with A::foo($a, $b = 0) in /in/ej2kJ on line 8
Process exited with code 255.

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