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php设计模式 DAO(数据访问对象模式)_PHP

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Release: 2016-06-01 12:15:59
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复制代码 代码如下:
/**
* 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
*/
?>
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