PHP代码:
<?
/
名称：CnkknDPHPLoginClass
描述：PHP用于登录的类，基于MysqL
作者：DanielKing，cnkknd@163.com
日期：2003/8/25
/ classLogin
{
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$err_MysqL="MysqLerror";//MysqL出错提示
var$err_username="usernameinvalid";//用户名无效提示
var$err_user="userinvalid";//用户无效提示(被封禁)
var$err_password="passworderror";//密码错误提示 var$err;//出错提示 var$errorreport=false;//显示错误 functionLogin($dbserv,$dbport,$dbuser,$dbpass,$dbname)//构造函数,连接数据库
{
if(@MysqL_pconnect($dbserv.":".$dbport,$dbpass))
{
MysqL_selectdb($dbname);
}
else
{
$this->errReport($this->errMysqL);
$this->err=$this->err_MysqL;
}
} functionisLoggedin()//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'];
returntrue;
}
else//如果cookie中未保存sid,则直接检查session
{
session_start();
if(isset($_SESSION['username']))
returntrue;
}
returnfalse;
} functionuserAuth($username,$userpass)//用户认证
{
$this->username=$username;
$this->userpass=$userpass;
$query="selectfrom".$this->authtable."whereusername='$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;
returnfalse;
}
elseif(md5($userpass)==$row['userpass'])//密码匹配
{
$this->userid=$row['id'];
$this->userlevel=$row['userlevel'];
returntrue;
}
else//密码不匹配
{
$this->errReport($this->err_password);
$this->err=$this->err_password;
returnfalse;
}
}
else//没有找到此用户
{
$this->errReport($this->err_username);
$this->err=$this->err_username;
returnfalse;
}
} functionsetSession()//置session
{
$sid=uniqid('sid');//生成sid
session_id($sid);
session_start();
$_SESSION['username']=$this->username;//给session变量赋值
$_SESSION['userid']=$this->userid;//..
$_SESSION['userlevel']=$this->userlevel;//..
if($this->use_cookie)//如果使用cookie保存sid
{
if(!setcookie('sid',$sid,time()+$this->cookietime,$this->cookiepath))
$this->errReport("setcookieFailed");
}
else
setcookie('sid','',time()-3600);//清除cookie中的sid
} functionuserlogout()//用户注销
{
session_start();
unset($_SESSION['username']);//清除session中的username
if(setcookie('sid',time()-3600))
//清除cookie中的sid
returntrue;
else
returnfalse;
} functionerrReport($str)//报错
{
if($this->error_report)
echo"ERROR:$str";
}
}
?> MysqL中表的结构
代码:
CREATETABLEaccount(
idbigint(20)NOTNULLauto_increment,
usernamevarchar(255)NOTNULLdefault'',
userpassvarchar(255)NOTNULLdefault'',
bannedtinyint(1)NOTNULLdefault'0',
userleveltinyint(4)NOTNULLdefault'0',
PRIMARYKEY(id)
)
使用一例
PHP代码:
<?
include"../myclasses/Login.PHP";
$dbserv="localhost";
$dbport="3306";
$dbuser="root";
$dbpass="123456";
$dbname="test"; $login=newLogin($dbserv,$dbname);
$login->error_report=true;
$login->cookietime=36002430;
if($login->isLoggedin())
{
echo$login->username."hasareadyloggedin";
}
elseif($login->userAuth("danielking","1234"))
{
echo"loginsuccessfully";
$login->setSession();
} echo"

...