MySQL Query: 
            SELECT id, name, quality, quantity, p1, p2, p3, p4, price_change
            FROM accessories
            WHERE id_category=
              AND visible=1
            ORDER BY name
        MySQL Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'AND visible=1
            ORDER BY name' at line 4