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<?php $a = array('a' => 'a', 'b' => 'b', 'z' => array('c' => 'c', 'd' => 'd')); $b = array('a' => 'c', 'z' => array('c' => 'e')); $merge = function($a, $b) use (&$merge){ if (is_array($a) && is_array($b)){ $return = array(); foreach ($b as $key => $value){ if (is_array($value) && isset($a[$key]) && is_array($a[$key])){ $return[] = $merge($a[$key], $value); } else { $return[] = $value; } } return $return; } else { return $b; } }; var_dump($merge($a, $b));
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { [0]=> string(1) "c" [1]=> array(1) { [0]=> string(1) "e" } }

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