本文给大家介绍的是用php实现的用户登录与验证的一段代码，没有把登录和数据库查询分开，有需要的朋友，可以参考学习下。

简单的登录类，没有把登录和数据库查询分开，代码如下:

1. /* 
2.  *   例子 
3.  * 
4.  *  $Auth=new Auth(); 
5.  *  $Auth->login("123@123.com","123"); 
6.  *  $Auth->logout(); 
7.  *  echo $r->init();     
8.  * 
9. **/ 

验证登陆类，代码如下:

1. <?php 
2. /* 
3.  * 
4.  * @ID:      验证登陆类 
5.  * 
6.  * @class:   Auth.class.php 
7.  * 
8.  * @auther:  欣儿 
9.  * 
10.  * @time:    2015/03/12 
11.  * 
12.  * @web:     http://my.oschina.net/xinger 
13.  * 
14. **/ 
15. class Auth { 
16.     //外部设置 
17.     //cookie设置 
18.     var $cookie_time;//         7200 
19.     var $cookie_where;//        '/' 
20.     var $cookie_domain;//       'yourweb.com' 
21.     var $cookie_secure;//       1和0 
22.     //数据库设置     
23.     var $select_uid;//          'uid' 
24.     var $select_table;//        'user' 
25.     var $select_usersname;//    'email' 
26.     var $select_password;//     'password' 
27.     //盐 
28.     var $salt;//                "12332" 
29.     var $guest_name;//          'Guest' 
30.     //用户获取值 
31.     var $user_id; 
32.     var $username; 
33.     var $ok; 
34.     var $pre;//                 'auth_' 
35.     var $depr;//                '-' 
36.     //内部变量 
37.     private $pre_username; 
38.     private $pre_password; 
39.     public function __construct($config=array()){ 
40.         $this->set($config); 
41.         $this->pre_username=sha1(md5($this->pre.'username')); 
42.         $this->pre_password=sha1(md5($this->pre.'password')); 
43.     } 
44.     public function set($config){ 
45.         $this->cookie_time       = isset($config['cookie_time'])?$config['cookie_time']: 7200; 
46.         $this->cookie_where      = isset($config['cookie_where'])?$config['cookie_where']:'/'; 
47.         $this->cookie_domain = isset($config['cookie_domain'])?$config['cookie_domain']:''; 
48.         $this->cookie_secure = isset($config['cookie_secure'])?$config['cookie_secure']:''; 
49.         $this->select_uid        = isset($config['select_uid'])?$config['select_uid']:'uid'; 
50.         $this->select_table      = isset($config['select_table'])?$config['select_table']:'table'; 
51.         $this->select_usersname  = isset($config['select_usersname'])?$config['select_usersname']:'user_name'; 
52.         $this->select_password   = isset($config['select_password'])?$config['select_password']:'password'; 
53.         $this->salt              = isset($config['salt'])?$config['salt']:'sghsdghsdg';// 
54.         $this->guest_name        = isset($config['guest_name'])?$config['guest_name']:'Guest';// 
55.         $this->pre               = isset($config['auth'])?$config['auth']:'auth_'; 
56.         $this->depr              = isset($config['depr'])?$config['depr']:'-'; 
57.     } 
58.     // 
59.     public function init(){ 
60.         $this->user_id       = 0; 
61.         $this->username      = $this->guest_name; 
62.         $this->ok            = false; 
63.         if(!$this->check_session()){ 
64.             $this->check_cookie(); 
65.         } 
66.         return $this->ok; 
67.     } 
68.     //验证SESSION 
69.     private function check_session(){ 
70.         if(!emptyempty($_SESSION[$this->pre_username])&&!emptyempty($_SESSION[$this->pre_password])){ 
71.             return $this->check($_SESSION[$this->pre_username],$_SESSION[$this->pre_password]); 
72.         } else { 
73.             return false; 
74.         } 
75.     } 
76.     //验证COOKIE 
77.     private function check_cookie(){ 
78.         if(!emptyempty($_COOKIE[$this->pre_username])&&!emptyempty($_COOKIE[$this->pre_password])){ 
79.             return $this->check($_COOKIE[$this->pre_username],$_COOKIE[$this->pre_password]); 
80.         } else { 
81.             return false; 
82.         } 
83.     } 
84.     //登陆 
85.     public function login($username,$password){ 
86.         $sql    = "select ".$this->select_uid." from ".$this->select_table." where ".$this->select_usersname."='$username' and ".$this->select_password."='$password'"; 
87.         $result = mysql_query($sql); 
88.         $rows   = mysql_num_rows($sql); 
89.         if($rows==1){ 
90.             $this->user_id   = mysql_result($result,0,0); 
91.             $this->username  = $username; 
92.             $this->ok        = true; 
93.             $username   = $username.$this->depr.$this->get_ip(); 
94.             $user_name  = $this->encrypt($username,'E',$this->salt); 
95.             $_SESSION[$this->pre_username]=$user_name; 
96.             $_SESSION[$this->pre_password]=md5(md5($password,$this->salt)); 
97.             setcookie($this->pre_username,$user_name,time()+$this->cookie_time,$this->cookie_where,$this->cookie_domain,$this->cookie_secure); 
98.             setcookie($this->pre_password,md5(md5($password,$this->salt)),time()+$this->cookie_time,$this->cookie_where,$this->cookie_domain,$this->cookie_secure); 
99.             return true; 
100.         } 
101.         return false; 
102.     } 
103.     //验证 
104.     private function check($username,$password){ 
105.         $user_name  = $this->encrypt($username,'D',$this->salt); 
106.         $name       = explode($this->depr, $user_name); 
107.         $username   = $name[0]; 
108.         $ip         = isset($name[1]) ? $name[1] : NULL; 
109.         if($ip !== $this->get_ip()) return false; 
110.         static $vars = array(); 
111.         if(!emptyempty($vars)&&is_array($vars)&&isset($vars[$username.$password])){ 
112.             $this->user_id   = $vars['user_id']; 
113.             $this->username  = $vars['username']; 
114.             $this->ok        = $vars['ok']; 
115.             return true; 
116.         } 
117.         $sql    = "select ".$this->select_uid.",".$this->select_password." from ".$this->select_table." where ".$this->select_usersname."='$username'"; 
118.         $query  = mysql_query($sql); 
119.         $result = mysql_fetch_array($query); 
120.         $row    = mysql_num_rows($sql); 
121.         if($row == 1){ 
122.             $db_password=$result[$this->select_password]; 
123.             if(md5(md5($db_password,$this->salt)) == $password){ 
124.                 $this->user_id   = $vars['user_id']  = $result[$this->select_uid]; 
125.                 $this->username  = $vars['username'] = $username; 
126.                 $this->ok        = $vars['ok']       = true; 
127.                 $vars[$username.$password]          = md5($username.$password); 
128.                 return true; 
129.             } 
130.         } 
131.         return false; 
132.     } 
133.     //退出 
134.     public function logout(){ 
135.         $this->user_id       = 0; 
136.         $this->username      = $this->guest_name; 
137.         $this->ok            = false; 
138.         $_SESSION[$this->pre_username]=""; 
139.         $_SESSION[$this->pre_password]=""; 
140.         setcookie($this->pre_username,"",time()-$this->cookie_time,$this->cookie_where,$this->cookie_domain,$this->cookie_secure); 
141.         setcookie($this->pre_password,"",time()-$this->cookie_time,$this->cookie_where,$this->cookie_domain,$this->cookie_secure); 
142.     }   
143.     //加密 
144.     public function encrypt($string,$operation,$key='') { 
145.         $key=md5($key); 
146.         $key_length=strlen($key); 
147.         $string=$operation=='D'?base64_decode($string):substr(md5($string.$key),0,8).$string; 
148.         $string_length=strlen($string); 
149.         $rndkey=$box=array(); 
150.         $result=''; 
151.         for($i=0;$i<=255;$i++) 
152.         { 
153.             $rndkey[$i]=ord($key[$i%$key_length]); 
154.             $box[$i]=$i; 
155.         } 
156.         for($j=$i=0;$i<256;$i++) 
157.         { 
158.             $j=($j+$box[$i]+$rndkey[$i])%256; 
159.             $tmp=$box[$i]; 
160.             $box[$i]=$box[$j]; 
161.             $box[$j]=$tmp; 
162.         } 
163.         for($a=$j=$i=0;$i<$string_length;$i++) 
164.         { 
165.             $a=($a+1)%256; 
166.             $j=($j+$box[$a])%256; 
167.             $tmp=$box[$a]; 
168.             $box[$a]=$box[$j]; 
169.             $box[$j]=$tmp; 
170.             $result.=chr(ord($string[$i])^($box[($box[$a]+$box[$j])%256])); 
171.         } 
172.         if($operation=='D') 
173.         { 
174.             if(substr($result,0,8)==substr(md5(substr($result,8).$key),0,8)) 
175.             { 
176.                 return substr($result,8); 
177.             } 
178.             else 
179.             { 
180.                 return''; 
181.             } 
182.         } 
183.         else 
184.         { 
185.             return str_replace('=','',base64_encode($result)); 
186.         } 
187.     } 
188.     public function get_ip() { 
189.         return $_SERVER['REMOTE_ADDR']; 
190.     } 
191. } 

以上就是本文的全部内容了，希望大家能够喜欢。

Tags: PHP验证登陆类

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