本篇内容主要讲解“怎么用PHP写一个验证登陆类”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“怎么用PHP写一个验证登陆类”吧!
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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