這篇文章主要介紹了PHP簡單實現單點登錄功能,結合實例形式分析了php基於session控制實現單點登錄的相關操作技巧,需要的朋友可以參考下（主要是提供一種單點登錄的思路之一，單點登錄的方式很多種）
本文實例講述了PHP簡單實現單點登錄功能。分享給大家供大家參考，具體如下：
1.準備兩個虛擬域名
127.0.0.1 www.openpoor.com
127.0.0.1 www.myspace.com
2.在openpoor的根目錄下創建以下文件
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,遊客;請先<a href="login.php" rel="external nofollow" >登錄</a><a href="http://www.myspace.com/index.php" rel="external nofollow" rel="external nofollow" >進入空間</a>
<?php else: ?>
hello,<?php echo $_SESSION['username']; ?>;<a href="http://www.myspace.com/index.php" rel="external nofollow" rel="external nofollow" >進入空間</a>
<?php endif; ?>
<a href="http://www.openpoor.com/index.php" rel="external nofollow" >home</a>
</body>
</html>
login.php
<?php
session_start();
if(!empty($_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="用戶名"/>
<input type="text" name="password" placeholder="密碼"/>
<input type="submit" value="登錄"/>
</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.οnlοad=function(){
location.replace('<?php echo $redirect; ?>');
}
</script>
</body>
</html>
3.在myspace的根目錄下創建如下文件
slogin文件 完成session的設置
<?php
session_start();
header('Content-Type:text/javascript; charset=utf-8');
if(!empty($_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 "歡迎來到".$_SESSION['username']."的空間";
}else{
echo "請先登錄";
}
?>
4.Des.php的文件內容如下
<?php
/**
*@see Yii CSecurityManager;
*/
class Des{
public static function encrypt($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;
}
}
?>
當在openpoor登錄後將session信息傳到其他域名下的文件下進行處理，以script標籤包含的形式進行運行。
5.此時訪問www.openpoor.com和www.myspace.com都是未登錄狀態
登錄後兩個域名下都是登錄狀態
到此我們實現了一個簡單的單點登錄。