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<?php $array = array("red"=>"apple","blue"=>"sky","orange"=>"juice"); $output = array(); // or, $output = null; $closure = function($element) use(&$output) { { $output[] = $element; } }; array_walk_recursive($array, $closure); print_r($output); /** Array ( [0] => apple [1] => sky [2] => juice ) **/
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => apple [1] => sky [2] => juice )

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