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<?php function test_print($item, $key) { echo "$key holds $item\n"; } function recursion($array, $key_parent) { if(count($array) == 0) return; foreach (new RecursiveIteratorIterator( new RecursiveArrayIterator($array), RecursiveIteratorIterator::CATCH_GET_CHILD) as $key => $value) { if(is_array($value)) { echo 'My Array Node ' . $key; recursion($value); } else { //echo 'My node ' . $key . ' with value ' . $value . PHP_EOL; if($key == $key_parent) $array[$key] = "**"; } } } $information = array("login" => "someUsername", "password" => "somePassword", "card_pin"=>"card_1234", "pin"=>"pin_356", "iin" => "iin_123", "shipping" => array("telephone" => "telephone_998"), "cardnumber" => "card_number_876", "customer_id" => "customer_654"); $list = "login,customer_id"; print_r($information); //array_walk_recursive($information, 'test_print'); recursion($information, "login"); print_r($information);

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