what im doing wrong ???

[it53lv]

can anyone tell me why is this query wrong ???

$result = $DB->query ('SELECT * FROM ' . DB_PREFIX . 'categories WHERE type_id={$type_id} ORDER BY order_id ASC');

type_id default value is 1

problem is ORDER BY order_id ASC gets ignored because of type_id function
so what i' m doing wrong with this ?