Php design mode DAO (Data Access Object mode) _ PHP Tutorial

Php design mode DAO (Data Access Object mode ). Copy the code as follows :? Php *** Data Access Object (DataAccessObject) example ** @ create_date: 2010-01-04 * classBaseDAO {var $ _ dbnull; var $ _ tablenull; functionBa The code is as follows:

/**
* Data Access Object example
*
* @ Create_date: 2010-01-04
*/

Class BaseDAO
{
Var $ _ db = null;
Var $ _ table = null;

Function BaseDAO ($ config)
{
$ This-> _ db = new MysqlDB (); // operation not allowed here
}

/**
* Get and process
*
* @ Param array $ filter // filter condition
* @ Param string $ field // Obtain the field
* @ Param int $ page // current page
* @ Param int $ limit // Number of pages
*/
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 ();

/**
* Common usage:
* Base class of the model layer in MVC
*/
?>

The http://www.bkjia.com/PHPjc/323783.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/323783.htmlTechArticle code is as follows :? Php/*** Data Access Object example ** @ create_date: 2010-01-04 */class BaseDAO {var $ _ db = null; var $ _ table = null; function Ba...