用PHP+MySQL开发,图书馆管理系统前后台全部代码(附带数据库脚本)，可添加、编辑、删除图书 和分类，具有两级用户权限-With PHP+ MySQL development, library management system around the table all the code (with the database scr ipt), you can add, edit, delete, and classification of books, with two user righ