php的一个登录的类 [推荐]
2024-05-04 22:13:35
供稿：网友
PHP代码:
<?
/*
* 名称：CnkknD PHP Login Class
* 描述：PHP用于登录的类，基于MySQL
* 作者：Daniel King，cnkknd@163.com
* 日期：2003/8/25
*/
class Login
{
var $username; //用户名
var $userpass; //密码
var $userid; //用户id
var $userlevel; //用户级别
var $authtable="account"; //验证用数据表
var $usecookie=true; //使用cookie保存sessionid
var $cookiepath='/'; //cookie路径
var $cookietime=108000; //cookie有效时间
var $err_mysql="mysql error"; //mysql出错提示
var $err_username="username invalid"; //用户名无效提示
var $err_user="user invalid"; //用户无效提示(被封禁)
var $err_password="password error"; //密码错误提示
var $err; //出错提示
var $errorreport=false; //显示错误
function Login($dbserv,$dbport,$dbuser,$dbpass,$dbname) //构造函数,连接数据库
{
if(@mysql_pconnect($dbserv.":".$dbport,$dbuser,$dbpass))
{
mysql_select_db($dbname);
}
else
{
$this->errReport($this->err_mysql);
$this->err=$this->err_mysql;
}
}
function isLoggedin() //判断是否登录
{
if(isset($_COOKIE['sid'])) //如果cookie中保存有sid
{
session_id($_COOKIE['sid']);
session_start();
$this->username=$_SESSION['username'];
$this->userid=$_SESSION['userid'];
$this->userlevel=$_SESSION['userlevel'];
return true;
}
else //如果cookie中未保存sid,则直接检查session
{
session_start();
if(isset($_SESSION['username']))
return true;
}
return false;
}
function userAuth($username,$userpass) //用户认证
{
$this->username=$username;
$this->userpass=$userpass;
$query="select * from `".$this->authtable."` where `username`='$username';";
$result=mysql_query($query);
if(mysql_num_rows($result)!=0) //找到此用户
{
$row=mysql_fetch_array($result);
if($row['bannd']==1) //此用户被封禁
{
$this->errReport($this->err_user);
$this->err=$this->err_user;
return false;
}
elseif(md5($userpass)==$row['userpass']) //密码匹配
{
$this->userid=$row['id'];
$this->userlevel=$row['userlevel'];
return true;
}
else //密码不匹配
{
$this->errReport($this->err_password);
$this->err=$this->err_password;
return false;
}
}
else //没有找到此用户
{
$this->errReport($this->err_username);
$this->err=$this->err_username;
return false;
}
}
function setSession() //置session
{
