PHP – recursive decode all JSON from a multidimensional array

 /**
     * Funtion make a recursive decode for a JSON an convert every object in array
     * @param type $json
     * @return boolean
     */
    function decode($json)
    {
        if ((is_string($json)) && (!$this->isJSON($json)))
        {
            return FALSE;
        }
        else
        {
            $new = [];
            if ($this->isJSON($json))
            {
                $json = (array) json_decode($json);
            }
            foreach ($json as $k => $v)
            {

                if (($this->isJSON($v)) || (is_array($v)) || (is_object($v)))
                {
                    $new[$k] = $this->decode($v); //RECURSION
                }
                else
                {
                    $new[$k] = ($v == 'null') ? "" : $this->dateTimeFormat($v);
                }
            }
            return $new;
        }
    }