PHP 验证登陆类分享

简单的登录类，没有把登录和数据库查询分开
复制代码代码如下:
/*
*   例子
*
* $Auth=new Auth（）;
* $Auth->login（"123@123.com","123"）;
* $Auth->logout（）;
* echo $r->init（）;
*
**/

验证登陆类
复制代码代码如下:
<?php
/*
*
* @ID:      验证登陆类
*
* @class:   Auth.class.php
*
* @auther: 欣儿
*
* @time:    2015/03/12
*
* @web:     http://my.oschina.net/xinger
*
**/
class Auth {
    //外部设置
    //cookie设置
    var $cookie_time;//         7200
    var $cookie_where;//        "/"
    var $cookie_domain;//       "yourweb.com"
    var $cookie_secure;//       1和0
    //数据库设置
    var $select_uid;//          "uid"
    var $select_table;//        "user"
    var $select_usersname;//    "email"
    var $select_password;//     "password"
    //盐
    var $salt;//                "12332"
    var $guest_name;//          "Guest"
    //用户获取值
    var $user_id;
    var $username;
    var $ok;
    var $pre;//                 "auth_"
    var $depr;//                "-"
    //内部变量
    private $pre_username;
    private $pre_password;
    public function __construct（$config=array（））{
        $this->set（$config）;
        $this->pre_username=sha1（md5（$this->pre."username"））;
        $this->pre_password=sha1（md5（$this->pre."password"））;
    }
    public function set（$config）{
        $this->cookie_time       = isset（$config["cookie_time"]）?$config["cookie_time"]: 7200;
        $this->cookie_where      = isset（$config["cookie_where"]）?$config["cookie_where"]:"/";
        $this->cookie_domain = isset（$config["cookie_domain"]）?$config["cookie_domain"]:"";
        $this->cookie_secure = isset（$config["cookie_secure"]）?$config["cookie_secure"]:"";
        $this->select_uid        = isset（$config["select_uid"]）?$config["select_uid"]:"uid";
        $this->select_table      = isset（$config["select_table"]）?$config["select_table"]:"table";
        $this->select_usersname = isset（$config["select_usersname"]）?$config["select_usersname"]:"user_name";
        $this->select_password   = isset（$config["select_password"]）?$config["select_password"]:"password";
        $this->salt              = isset（$config["salt"]）?$config["salt"]:"sghsdghsdg";//
        $this->guest_name        = isset（$config["guest_name"]）?$config["guest_name"]:"Guest";//
        $this->pre               = isset（$config["auth"]）?$config["auth"]:"auth_";
        $this->depr              = isset（$config["depr"]）?$config["depr"]:"-";
    }
    //
    public function init（）{
        $this->user_id       = 0;
        $this->username      = $this->guest_name;
        $this->ok            = false;
        if（！$this->check_session（））{
            $this->check_cookie（）;
        }
        return $this->ok;
    }
    //验证SESSION
    private function check_session（）{
        if（！empty（$_SESSION[$this->pre_username]）&&！empty（$_SESSION[$this->pre_password]））{
            return $this->check（$_SESSION[$this->pre_username],$_SESSION[$this->pre_password]）;
        } else {
            return false;
        }
    }
    //验证COOKIE
    private function check_cookie（）{
        if（！empty（$_COOKIE[$this->pre_username]）&&！empty（$_COOKIE[$this->pre_password]））{
            return $this->check（$_COOKIE[$this->pre_username],$_COOKIE[$this->pre_password]）;
        } else {
            return false;
        }
    }
    //登陆
    public function login（$username,$password）{
        $sql    = "select ".$this->select_uid." from ".$this->select_table." where ".$this->select_usersname."="$username" and ".$this->select_password."="$password"";
        $result = mysql_query（$sql）;
        $rows   = mysql_num_rows（$sql）;
        if（$rows==1）{
            $this->user_id   = mysql_result（$result,0,0）;
            $this->username = $username;
            $this->ok        = true;
            $username   = $username.$this->depr.$this->get_ip（）;
            $user_name = $this->encrypt（$username,"E",$this->salt）;
            $_SESSION[$this->pre_username]=$user_name;
            $_SESSION[$this->pre_password]=md5（md5（$password,$this->salt））;
            setcookie（$this->pre_username,$user_name,time（）+$this->cookie_time,$this->cookie_where,$this->cookie_domain,$this->cookie_secure）;
            setcookie（$this->pre_password,md5（md5（$password,$this->salt））,time（）+$this->cookie_time,$this->cookie_where,$this->cookie_domain,$this->cookie_secure）;
            return true;
        }
        return false;
    }
    //验证
    private function check（$username,$password）{
        $user_name = $this->encrypt（$username,"D",$this->salt）;
        $name       = explode（$this->depr, $user_name）;
        $username   = $name[0];
        $ip         = isset（$name[1]） ? $name[1] : NULL;
        if（$ip ！== $this->get_ip（）） return false;
        static $vars = array（）;
        if（！empty（$vars）&&is_array（$vars）&&isset（$vars[$username.$password]））{
            $this->user_id   = $vars["user_id"];
            $this->username = $vars["username"];
            $this->ok        = $vars["ok"];
            return true;
        }
        $sql    = "select ".$this->select_uid.",".$this->select_password." from ".$this->select_table." where ".$this->select_usersname."="$username"";
        $query = mysql_query（$sql）;
        $result = mysql_fetch_array（$query）;
        $row    = mysql_num_rows（$sql）;
        if（$row == 1）{
            $db_password=$result[$this->select_password];
            if（md5（md5（$db_password,$this->salt）） == $password）{
                $this->user_id   = $vars["user_id"] = $result[$this->select_uid];
                $this->username = $vars["username"] = $username;
                $this->ok        = $vars["ok"]       = true;
                $vars[$username.$password]          = md5（$username.$password）;
                return true;
            }
        }
        return false;
    }
    //退出
    public function logout（）{
        $this->user_id       = 0;
        $this->username      = $this->guest_name;
        $this->ok            = false;
        $_SESSION[$this->pre_username]="";
        $_SESSION[$this->pre_password]="";
        setcookie（$this->pre_username,"",time（）-$this->cookie_time,$this->cookie_where,$this->cookie_domain,$this->cookie_secure）;
        setcookie（$this->pre_password,"",time（）-$this->cookie_time,$this->cookie_where,$this->cookie_domain,$this->cookie_secure）;
    }
    //加密
    public function encrypt（$string,$operation,$key=""） {
        $key=md5（$key）;
        $key_length=strlen（$key）;
        $string=$operation=="D"?base64_decode（$string）:substr（md5（$string.$key）,0,8）.$string;
        $string_length=strlen（$string）;
        $rndkey=$box=array（）;
        $result="";
        for（$i=0;$i<=255;$i++）
        {
            $rndkey[$i]=ord（$key[$i%$key_length]）;
            $box[$i]=$i;
        }
        for（$j=$i=0;$i<256;$i++）
        {
            $j=（$j+$box[$i]+$rndkey[$i]）%256;
            $tmp=$box[$i];
            $box[$i]=$box[$j];
            $box[$j]=$tmp;
        }
        for（$a=$j=$i=0;$i<$string_length;$i++）
        {
            $a=（$a+1）%256;
            $j=（$j+$box[$a]）%256;
            $tmp=$box[$a];
            $box[$a]=$box[$j];
            $box[$j]=$tmp;
            $result.=chr（ord（$string[$i]）^（$box[（$box[$a]+$box[$j]）%256]））;
        }
        if（$operation=="D"）
        {
            if（substr（$result,0,8）==substr（md5（substr（$result,8）.$key）,0,8））
            {
                return substr（$result,8）;
            }
            else
            {
                return"";
            }
        }
        else
        {
            return str_replace（"=","",base64_encode（$result））;
        }
    }
    public function get_ip（） {
        return $_SERVER["REMOTE_ADDR"];
    }
}
?>

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