src/Request.php
public function getQueryString()
    {
        if (isset($this->_queryString)) {
            return $this->_queryString;
        }
        return $this->_queryString = isset($_SERVER['QUERY_STRING']) ? $_SERVER['QUERY_STRING'] : '';
    }
public function getQueryString()
    {
        if (isset($this->_queryString)) {
            return $this->_queryString;
        }
        return $this->_queryString = isset($_SERVER['QUERY_STRING']) ? $_SERVER['QUERY_STRING'] : '';
    }
public function getQueryString ( ) { if ( isset ( $ this -> _queryString ) ) { return $ this -> _queryString ; } return $ this -> _queryString = isset ( $ _SERVER [ 'QUERY_STRING' ] ) ? $ _SERVER [ 'QUERY_STRING' ] : '' ; }
Returns part of the request URL that is after the question mark.

@return string part of the request URL that is after the question mark
Returns part of the request URL that is after the question mark .