【DEBUG】
REQUEST_URI: /charger-p-express.php/7+LEICA+C-LUX-2+
cid=7 | brand=LEICA | model=NULL
path数组: Array
(
    [0] => 7
    [1] => LEICA
    [2] => C-LUX-2
)
SQL: SELECT DISTINCT categories_name
FROM categories
WHERE categories_id='7'
AND languages_id=1