Course Design Manual Format PHP Design Pattern DAO Data Access Object Pattern

Data Access Object (Data Access Object) example, friends who learn PHP can refer to it.

The code is as follows:

<?php 
/** 
* 数据访问对象(Data Access Object) 示例 
* 
* @create_date: 2010-01-04 
*/ 
class BaseDAO 
{ 
var $_db = null; 
var $_table = null; 
function BaseDAO($config) 
{ 
$this->_db = new MysqlDB(); // 这里的不能进行操作 
} 
/** 
* 获取处理 
* 
* @param array $filter // 过滤条件 
* @param string $field // 获取字段 
* @param int $page // 当前页 
* @param int $limit // 页数 
*/ 
function fetch($filter = array(),$field = "*",$page = 1,$limit = null) 
{ 
$this->_db->select($filed)->from($this->_table)->where($filter)->limit($page,$limit); 
return $this->_db->execute(); 
} 
function update(){} 
function delete(){} 
function insert(){} 
} 
class MemberDAO extends BaseDAO 
{ 
var $_table = "member"; 
} 
$oMember = new MemberDAO(); 
$oMember->fetch(); 
/** 
* 常用到的地方: 
* MVC中model层基类 
*/ 
?>

The above introduces the format of course design instructions, PHP design pattern, DAO data access object pattern, including the format of course design instructions. I hope it will be helpful to friends who are interested in PHP tutorials.