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<?php $a1 = [1 => 'foo', 2 => 'bar']; $a2 = [2 => 'bar2', 3 => 'baz']; $a3 = []; var_dump($a1); var_dump(array_replace($a1, $a2)); var_dump(array_replace($a1, $a3));
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { [1]=> string(3) "foo" [2]=> string(3) "bar" } array(3) { [1]=> string(3) "foo" [2]=> string(4) "bar2" [3]=> string(3) "baz" } array(2) { [1]=> string(3) "foo" [2]=> string(3) "bar" }

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