数据库处理中的增删改查

<?php
    //管理员实体类
    class ManageModel extends Model{

        private $id;
        private $admin_user;
        private $admin_pass;
        private $level;
        private $limit;
        private $last_ip;

        //拦截器(__set)
        public function __set($_key,$_value){
            $this->$_key=Tool::mysqlString($_value);
        }
        //拦截器(__get)
        public function __get($_key){
            return $this->$_key;

        }

        //设置管理员登录统计次数、ip、时间
        public function setLoginCount(){
            $_sql="UPDATE
                              cms_manage
                        SET
                              login_count=login_count+1,
                              last_ip=‘$this->last_ip‘,
                              last_time=NOW()
                      WHERE
                              admin_user=‘$this->admin_user‘
                       LIMIT
                              1";
            return parent::aud($_sql);

        }

        //获取管理员总记录
        public function getManageTotal(){
            $_sql="SELECT
                              COUNT(*)
                     FROM
                              cms_manage";
            return parent::total($_sql);
        }

        //查询登录管理员
        public function getLoginManage(){
            $_sql="SELECT
                                m.admin_user,
                                l.level_name
                     FROM
                                cms_manage m,
                                cms_level l
                    WHERE
                                m.admin_user=‘$this->admin_user‘
                      AND
                                m.admin_pass=‘$this->admin_pass‘
                      AND
                                l.id=m.level
                     LIMIT
                                1";
            return parent::one($_sql);
        }

        //查询单个管理员
        public function getOneManage(){
            $_sql="SELECT
                            id,
                            admin_user,
                            admin_pass,
                            level
                     FROM
                            cms_manage
                    WHERE
                            id=‘$this->id‘
                       OR
                            admin_user=‘$this->admin_user‘
                       OR
                            level=‘$this->level‘
                     LIMIT
                            1";
            return parent::one($_sql);
        }

        //查询所有管理员
        public function getAllManage(){
            $_sql="SELECT
                                m.id,
                                m.admin_user,
                                m.login_count,
                                m.last_ip,
                                m.last_time,
                                l.level_name
                      FROM
                                cms_manage m,
                                cms_level l
                     WHERE
                                l.id=m.level
                  ORDER BY
                                m.id DESC
                                $this->limit";

            return parent::all($_sql);
        }

        //新增管理员
        public function addManage(){
               $_sql="INSERT INTO
                                  cms_manage(
                                                admin_user,
                                                admin_pass,
                                                level,
                                                reg_time
                                            )
                                      VALUES(
                                                ‘$this->admin_user‘,
                                                ‘$this->admin_pass‘,
                                                ‘$this->level‘,
                                                NOW()
                                            )";
            return parent::aud($_sql);
        }

        //修改管理员
        public function updateManage(){
            $_sql = "UPDATE
                               cms_manage
                        SET
                               admin_pass=‘$this->admin_pass‘,
                               level=‘$this->level‘
                      WHERE
                               id=‘$this->id‘
                       LIMIT
                               1";
            return parent::aud($_sql);
        }

        //删除管理员
        public function deleteManage(){
            $_sql="DELETE FROM
                                  cms_manage
                          WHERE
                                  id=‘$this->id‘
                          LIMIT 1";
            return parent::aud($_sql);
        }

    }