private function __getQueryString($queryAr = array(), $prefixIfNotEmpty = '')
    {
        $queryAr = array_filter($queryAr);
        array_walk($queryAr, function (&$val, $key) {
            $val = urlencode($key) . '=' . urlencode($val);
        });

        return $queryAr ? $prefixIfNotEmpty . join('&', $queryAr) : '';
    }
private function __getQueryString($queryAr = array(), $prefixIfNotEmpty = '')
    {
        $queryAr = array_filter($queryAr);
        array_walk($queryAr, function (&$val, $key) {
            $val = urlencode($key) . '=' . urlencode($val);
        });

        return $queryAr ? $prefixIfNotEmpty . join('&', $queryAr) : '';
    }
private function __getQueryString ( $ queryAr = array ( ) , $ prefixIfNotEmpty = '' ) { $ queryAr = array_filter ( $ queryAr ) ; array_walk ( $ queryAr , function ( & $ val , $ key ) { $ val = urlencode ( $ key ) . '=' . urlencode ( $ val ) ; } ) ; return $ queryAr ? $ prefixIfNotEmpty . join ( '&' , $ queryAr ) : '' ; }
Convert query array to encoded query string.

@param array $queryAr
@param string $prefixIfNotEmpty
@return string
Convert query array to encoded query string .