class Users extends Table { // 针对于Users表的操作 function getById() { $sql = '.....'; } } class Products extends Table { // 针对Products表的操作 function showoff() { $sql = 'XXXX products'; } } class Admins extends Table { function changePermissions() { $sql = '....'; } } $users = new Users(); $users->delete(); echo '这张表叫', $users->getTableName(), '<br/><br/>'; $p = new Products(); $p->update(); $a = new Admins(); $a->insert();