takifouhal

 function set_deep_index_value(&$data,$data_indexes,$new_value){
        foreach ($data_indexes as $index){
            if($index == sizeof($data_indexes)-1)  $data[$index]=$new_value;
            else return set_deep_index_value($data[$index],array_slice($data_indexes,1),$new_value);
        }
    }

    function persist_config($target,$new_value = null) {
        if(is_array($target) && sizeof($target) == 1){
            $new_value = array_values($target)[0];