function add_query_arg() {
        $ret = '';

        if ( is_array( func_get_arg(0) ) ) {
                if ( @func_num_args() < 2 || false === @func_get_arg( 1 ) )
                        if ( get_bloginfo('url') != '' )
                                $uri = bloginfo('url') . $_SERVER['REQUEST_URI'];
                        else
                                $uri = $_SERVER['REQUEST_URI'];
                else
                        $uri = @func_get_arg( 1 );
        } else {
                if ( @func_num_args() < 3 || false === @func_get_arg( 2 ) )
                        if ( get_bloginfo('url') != '' )
                                $uri = bloginfo('url') . $_SERVER['REQUEST_URI'];
                        else
                                $uri = $_SERVER['REQUEST_URI'];
                else
                        $uri = @func_get_arg( 2 );
        }