    public function load_lines()
    {
        global $DB;

        $DB->query('
            SELECT * 
            FROM nv_orders_lines 
            WHERE `order` = '.protect($this->id).' 
            ORDER BY position ASC'
        );
        $this->lines = $DB->result();
    }

The software constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component.