/**
        * Parse out url query string into an associative array
        *
        * $qry can be any valid url or just the query string portion.
        * Will return false if no valid querystring found
        *
        * @param $qry String
        * @return Array
        */
        function queryToArray($qry)
        {
                $result = array();
                //string must contain at least one = and cannot be in first position
                if(strpos($qry,'=')) {

                 if(strpos($qry,'?')!==false) {
                   $q = parse_url($qry);
                   $qry = $q['query'];
                  }
                }else {
                        return false;
                }

                foreach (explode('&', $qry) as $couple) {
                        list ($key, $val) = explode('=', $couple);
                        $result[$key] = $val;
                }

                return empty($result) ? false : $result;

        }

This will take an url or just the querystring portion and break it out into an array

Parse url querystring into an array

PHP