Detailed explanation of steps to implement single sign-on with PHP

这次给大家带来PHP实现单点登录步骤详解，PHP实现单点登录的注意事项有哪些，下面就是实战案例，一起来看一下。

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();
?>
nbsp;html>


<meta>
<title>sync login</title>


<?php  if(empty($_SESSION[&#39;username&#39;])):?>
hello,游客;请先<a>登录</a><a>进入空间</a>
<?php  else: ?>
hello,<?php  echo $_SESSION[&#39;username&#39;]; ?>;<a>进入空间</a>
<?php  endif; ?>
 <a>home</a>

login.php

<?php session_start();
if(!empty($_POST[&#39;username&#39;])){
 require &#39;../Des.php&#39;;
 $_SESSION[&#39;username&#39;] = $_POST[&#39;username&#39;];
 $redirect = &#39;http://www.openpoor.com/index.php&#39;;
 header(&#39;Location:http://www.openpoor.com/sync.php?redirect=&#39;.urlencode($redirect).&#39;&code=&#39;.Des::encrypt($_POST[&#39;username&#39;],&#39;openpoor&#39;));exit;
}
?>
nbsp;html>


<meta>
<title>sync login</title>

     

sync.php

<?php $redirect = empty($_GET[&#39;redirect&#39;]) ? &#39;www.openpoor.com&#39; : $_GET[&#39;redirect&#39;];
if(empty($_GET[&#39;code&#39;])){
 header(&#39;Loaction:http://&#39;.urldecode($redirect));
 exit;
}
$apps = array(
 &#39;www.myspace.com/slogin.php&#39;
);
?>
nbsp;html>


<meta>
<?php  foreach($apps as $v): ?>
<script>"></script>
<?php  endforeach; ?>
<title>passport</title>


<script>
window.onload=function(){
 location.replace(&#39;<?php echo $redirect; ?>&#39;);
}
</script>

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(&#39;Content-Type:text/javascript; charset=utf-8&#39;);
if(!empty($_GET[&#39;code&#39;])){
 require &#39;../Des.php&#39;;
 $username = Des::decrypt($_GET[&#39;code&#39;],&#39;openpoor&#39;);
 if(!empty($username)){
  header(&#39;P3P: CP="CURa ADMa DEVa PSAo PSDo OUR BUS UNI PUR INT DEM STA PRE COM NAV OTC NOI DSP COR"&#39;);
  $_SESSION[&#39;username&#39;] = $username;
 }
}
?>

index.php

<?php session_start();
if(!empty($_SESSION[&#39;username&#39;]))
{
  echo "欢迎来到".$_SESSION[&#39;username&#39;]."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(&#39;des&#39;,&#39;&#39;, MCRYPT_MODE_CBC,&#39;&#39;);
   $key=substr(md5($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($data).&#39;_&#39;.base64_encode($encrypted);
 }
 public static function decrypt($data,$key){
   $_data = explode(&#39;_&#39;,$data,2);
   if(count($_data)<2){
  return false;
   }
   $data = base64_decode($_data[1]);
   $module=mcrypt_module_open(&#39;des&#39;,&#39;&#39;, MCRYPT_MODE_CBC,&#39;&#39;);
   $key=substr(md5($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

登录后两个域名下都是登录状态

到此我们实现了一个简单的单点登录。

相信看了本文案例你已经掌握了方法，更多精彩请关注php中文网其它相关文章！

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