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<?php $test = array(5 => "bar", 6 => "baz"); function testCallback($item, $arg = false) { return $item; } var_dump( array_map("testCallback", $test), array_map("testCallback", $test, array(true)), );
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { [5]=> string(3) "bar" [6]=> string(3) "baz" } array(2) { [0]=> string(3) "bar" [1]=> string(3) "baz" }

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