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PHP简单实现单点登录功能示例

本文实例讲述了PHP简单实现单点登录功能。分享给大家供大家参考，具体如下：

1.准备两个虚拟域名

127.0.0.1 www.openpoor.com
127.0.0.1 www.myspace.com

2.在openpoor的根目录下创建以下文件

index.PHP

?php
session_start();
?>
!DOCTYPE html>
html>
head>
meta charset="UTF-8"/>
title>sync login/title>
/head>
body>
?php if(empty($_SESSION['username'])):?>
hello,游客;请先a href="login.php" rel="external nofollow" >登录/a>a href="http://www.myspace.com/index.php" rel="external nofollow" rel="external nofollow" >进入空间/a>
?php else: ?>
hello,?php echo $_SESSION['username']; ?>;a href="http://www.myspace.com/index.php" rel="external nofollow" rel="external nofollow" >进入空间/a>
?php endif; ?>
 a href="http://www.openpoor.com/index.php" rel="external nofollow" >home/a>
/body>
/html>

?php
session_start();
if(!empty($_POST['username'])){
 require '../Des.php';
 $_SESSION['username'] = $_POST['username'];
 $redirect = 'http://www.openpoor.com/index.php';
 header('Location:http://www.openpoor.com/sync.php?redirect='.urlencode($redirect).'code='.Des::encrypt($_POST['username'],'openpoor'));exit;
}
?>
!DOCTYPE html>
html>
head>
meta charset="UTF-8"/>
title>sync login/title>
/head>
body>
form action="" method="post">
 input type="text" name="username" placeholder="用户名"/>
 input type="text" name="password" placeholder="密码"/>
 input type="submit" value="登录"/>
/form>
/body>
/html>

sync.php

?php
$redirect = empty($_GET['redirect']) ? 'www.openpoor.com' : $_GET['redirect'];
if(empty($_GET['code'])){
 header('Loaction:http://'.urldecode($redirect));
 exit;
}
$apps = array(
 'www.myspace.com/slogin.php'
);
?>
!DOCTYPE html>
html>
head>
meta charset="UTF-8"/>
?php foreach($apps as $v): ?>
script type="text/javascript" src="http://?php echo $v.'?code='.$_GET['code'] ?>">/script>
?php endforeach; ?>
title>passport/title>
/head>
body>
script type="text/javascript">
window.onload=function(){
 location.replace('?php echo $redirect; ?>');
}
/script>
/body>
/html>

3.在myspace的根目录下创建如下文件

slogin文件完成session的设置

?php
session_start();
header('Content-Type:text/javascript; charset=utf-8');
if(!empty($_GET['code'])){
 require '../Des.php';
 $username = Des::decrypt($_GET['code'],'openpoor');
 if(!empty($username)){
  header('P3P: CP="CURa ADMa DEVa PSAo PSDo OUR BUS UNI PUR INT DEM STA PRE COM NAV OTC NOI DSP COR"');
  $_SESSION['username'] = $username;
 }
}
?>

index.php

?php
session_start();
if(!empty($_SESSION['username']))
{
  echo "欢迎来到".$_SESSION['username']."的空间";
}else{
  echo "请先登录";
}
?>

4.Des.php的文件内容如下

?php
/**
 *@see Yii CSecurityManager;
 */
class Des{
 public static function encrypt($data,$key){
   $module=mcrypt_module_open('des','', MCRYPT_MODE_CBC,'');
   $key=substr(md5($key),0,mcrypt_enc_get_key_size($module));
   srand();
   $iv=mcrypt_create_iv(mcrypt_enc_get_iv_size($module), MCRYPT_RAND);
   mcrypt_generic_init($module,$key,$iv);
   $encrypted=$iv.mcrypt_generic($module,$data);
   mcrypt_generic_deinit($module);
   mcrypt_module_close($module);
   return md5($data).'_'.base64_encode($encrypted);
 }
 public static function decrypt($data,$key){
   $_data = explode('_',$data,2);
   if(count($_data)2){
  return false;
   }
   $data = base64_decode($_data[1]);
   $module=mcrypt_module_open('des','', MCRYPT_MODE_CBC,'');
   $key=substr(md5($key),0,mcrypt_enc_get_key_size($module));
   $ivSize=mcrypt_enc_get_iv_size($module);
   $iv=substr($data,0,$ivSize);
   mcrypt_generic_init($module,$key,$iv);
   $decrypted=mdecrypt_generic($module,substr($data,$ivSize,strlen($data)));
   mcrypt_generic_deinit($module);
   mcrypt_module_close($module);
   $decrypted = rtrim($decrypted,"\0");
   if($_data[0]!=md5($decrypted)){
  return false;
   }
   return $decrypted;
 }
}
?>

当在openpoor登录后将session信息传到其他域名下的文件下进行处理，以script标签包含的形式进行运行。

5.此时访问www.openpoor.com和www.myspace.com都是未登录状态