PMA\libraries\DbQbe::_getOrderByClause PHP Method

    private function _getOrderByClause()
    {
        $orderby_clause = '';
        $orderby_clauses = array();
        // Create copy of instance variables
        $columns = $this->_formColumns;
        $sort = $this->_formSorts;
        $sortOrder = $this->_formSortOrders;
        if (!empty($sortOrder) && count($sortOrder) == count($sort) && count($sortOrder) == count($columns)) {
            // Sort all three arrays based on sort order
            array_multisort($sortOrder, $sort, $columns);
        }
        for ($column_index = 0; $column_index < $this->_criteria_column_count; $column_index++) {
            // if all columns are chosen with * selector,
            // then sorting isn't available
            // Fix for Bug #570698
            if (empty($columns[$column_index]) && empty($sort[$column_index])) {
                continue;
            }
            if (mb_substr($columns[$column_index], -2) == '.*') {
                continue;
            }
            if (!empty($sort[$column_index])) {
                $orderby_clauses[] = $columns[$column_index] . ' ' . $sort[$column_index];
            }
        }
        // end for
        if (!empty($orderby_clauses)) {
            $orderby_clause = 'ORDER BY ' . htmlspecialchars(implode(", ", $orderby_clauses)) . "\n";
        }
        return $orderby_clause;
    }