<？php

class link_mysql{

	private ￥host，￥uid，￥pwd，￥db，￥link，￥res;

	function link_mysql（￥_host，￥_uid，￥_pwd，￥_db）{

		￥this->host = ￥_host;

		￥this->uid = ￥_uid;

		￥this->pwd = ￥_pwd;

		￥this->db = ￥_db;

		￥this->link = mysql_connect（￥this->host，￥this->uid，￥this->pwd）;

		mysql__db（￥this->db，￥this->link）;

	}

	function exec_sql（￥sql）{

		//if you use  sentence，then you must open your link;

		￥res = mysql_query（￥sql）;

		return ￥res;

	}

}

￥obj_link = new link_mysql（localhost，，，website）;

￥res = ￥obj_link->exec_sql（   userinfo）;

￥str = [;

while（￥rows = mysql_fetch_assoc（￥res））{

	￥str = ￥str.{name:￥rows[name]，password:￥rows[password]，age:￥rows[age]}，;

}

￥str = rtrim（￥str，，） .];

echo ￥str;

？>