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<?php interface Foo { public function doStuff(array $a, string $b = null); } class Bar implements Foo { public function doStuff($a, $b = null) { var_dump($a, $b); } } $a = new Bar(); $a->doStuff([1,2,3,4], 'asdsad'); $a->doStuff([5,6,7,8]);
Output for git.master, git.master_jit, rfc.property-hooks
array(4) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> int(4) } string(6) "asdsad" array(4) { [0]=> int(5) [1]=> int(6) [2]=> int(7) [3]=> int(8) } NULL

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