php购物车功能实现

CREATE TABLE inventory ( product tinytext NOT NULL, quantity tinytext NOT NULL, id int(4) DEFAULT '0' NOT NULL auto_increment, description tinytext NOT NULL, price float(10,2) DEFAULT '0.00' NOT NULL, category char(1) DEFAULT '' NOT NULL, KEY id (id), PRIMARY KEY (id), KEY price (price) ); insert into inventory values ('硬盘','5','1','80G','5600','1'); insert into inventory values ('CPU','12','2','P4-2.4G','6600','1'); insert into inventory values ('DVD-ROM','7','3','12X','2000','1'); insert into inventory values ('主板','3','4','ASUS','5000','2'); insert into inventory values ('显示卡','6','5','64M','4500','1'); insert into inventory values ('刻录机','4','6','52W','3000','1');