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<?php interface AncientStableInterface { public function doThings($val); } class Stuff implements AncientStableInterface { public function doThings($val) { return $val; } } class NewStuff implements AncientStableInterface { public function doThings($val, array $optional = array()) { return $val + count($optional); } } $a = new Stuff; var_dump($a->doThings(123)); $a = new NewStuff; var_dump($a->doThings(123, array(4, 5)));
Output for git.master, git.master_jit, rfc.property-hooks
int(123) int(125)

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