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<?php interface I { public function example($a, $b, $c); } class A implements I { public function example($a, $b = null, $c = null) { } // compatible with I::example } class B extends A { public function example($a, $b, $c = null) { } // compatible with I::example } function accepts_i(I $i) { $i->example(1, 2, 3); } accepts_i(new B); // no problem function accepts_a(A $a) { $a->example(1); } accepts_a(new B); // problem
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Declaration of B::example($a, $b, $c = null) must be compatible with A::example($a, $b = null, $c = null) in /in/OneV3 on line 10
Process exited with code 255.

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