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网站外链跳转页面/外链本地化代码的一些改善方法分享

很久之前在博客分享了几篇关于外链跳转的代码或教程。如果没看过的可以先了解下：
《非插件实现Emlog评论链接本地化的方法》
《EMLOG文章外链自动本地化或直接外链加nofollow属性的方法》
最近，有了一些灵感以及在其他博客也吸收了一些相关经验，就把现用的外链代码小改了下，感觉还不错，现在分享下，喜欢的可以试试

<?php 
if(strlen($_SERVER['REQUEST_URI']) > 384 ||
    strpos($_SERVER['REQUEST_URI'], "eval(") ||
	strpos($_SERVER['REQUEST_URI'], "base64")) {
		@header("HTTP/1.1 414 Request-URI Too Long");
		@header("Status: 414 Request-URI Too Long");
		@header("Connection: Close");
		@exit;
}
//通过QUERY_STRING取得完整的传入数据，然后取得url=之后的所有值，兼容性更好
$t_url = preg_replace('/^url=(.*)$/i','$1',$_SERVER["QUERY_STRING"]);
 
//数据处理
if(!empty($t_url)) {
    //判断取值是否加密
    if ($t_url == base64_encode(base64_decode($t_url))) {
        $t_url =  base64_decode($t_url);
    }
    //对取值进行网址校验和判断
    preg_match('/^(http|https|thunder|qqdl|ed2k|Flashget|qbrowser):\/\//i',$t_url,$matches);
	if($matches){
	    $url=$t_url;
	    $title='页面加载中,请稍候...';
	} else {
	    preg_match('/\./i',$t_url,$matche);
	    if($matche){
	        $url='http://'.$t_url;
	        $title='页面加载中,请稍候...';
	    } else {
	        $url = 'http://'.$_SERVER['HTTP_HOST'];
	        $title='参数错误，正在返回首页...';
	    }
	}
} else {
    $title = '参数缺失，正在返回首页...';
    $url = 'http://'.$_SERVER['HTTP_HOST'];
}
?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="robots" content="noindex, nofollow" />
<noscript><meta http-equiv="refresh" content="1;url='<?php echo $url;?>';"></noscript>
<script>
function link_jump()
{
    //禁止其他网站使用我们的跳转页面
    var MyHOST = new RegExp("<?php echo $_SERVER['HTTP_HOST']; ?>");
    if (!MyHOST.test(document.referrer)) {
         location.href="http://" + MyHOST;
    }
    location.href="<?php echo $url;?>";
}
//延时1S跳转，可自行修改延时时间
setTimeout(link_jump, 1000);
//延时50S关闭跳转页面，用于文件下载后不会关闭跳转页的问题
setTimeout(function(){window.opener=null;window.close();}, 50000);
</script>
<title><?php echo $title;?></title>
<style type="text/css">
body{background:#555}.loading{-webkit-animation:fadein 2s;-moz-animation:fadein 2s;-o-animation:fadein 2s;animation:fadein 2s}@-moz-keyframes fadein{from{opacity:0}to{opacity:1}}@-webkit-keyframes fadein{from{opacity:0}to{opacity:1}}@-o-keyframes fadein{from{opacity:0}to{opacity:1}}@keyframes fadein{from{opacity:0}to{opacity:1}}.spinner-wrapper{position:absolute;top:0;left:0;z-index:300;height:100%;min-width:100%;min-height:100%;background:rgba(255,255,255,0.93)}.spinner-text{position:absolute;top:45%;left:50%;margin-left:-100px;margin-top:2px;color:#000;letter-spacing:1px;font-size:20px;font-family:Arial}.spinner{position:absolute;top:45%;left:50%;display:block;margin-left:-160px;width:1px;height:1px;border:20px solid rgba(255,0,0,1);-webkit-border-radius:50px;-moz-border-radius:50px;border-radius:50px;border-left-color:transparent;border-right-color:transparent;-webkit-animation:spin 1.5s infinite;-moz-animation:spin 1.5s infinite;animation:spin 1.5s infinite}@-webkit-keyframes spin{0%,100%{-webkit-transform:rotate(0deg) scale(1)}50%{-webkit-transform:rotate(720deg) scale(0.6)}}@-moz-keyframes spin{0%,100%{-moz-transform:rotate(0deg) scale(1)}50%{-moz-transform:rotate(720deg) scale(0.6)}}@-o-keyframes spin{0%,100%{-o-transform:rotate(0deg) scale(1)}50%{-o-transform:rotate(720deg) scale(0.6)}}@keyframes spin{0%,100%{transform:rotate(0deg) scale(1)}50%{transform:rotate(720deg) scale(0.6)}}
</style>
</head>
<body>
<div class="loading">
  <div class="spinner-wrapper">
    <span class="spinner-text">页面加载中，请稍候...</span>
    <span class="spinner"></span>
  </div>
</div>
</body>
</html>

以下代码为舍力自行修改后增加屏蔽网站和网址无解析做404错误，代码如下：

<?php
if(strlen($_SERVER['REQUEST_URI']) > 384 || strpos($_SERVER['REQUEST_URI'], "eval(") || strpos($_SERVER['REQUEST_URI'],"base64")){@header("HTTP/1.1 414 Request-URI Too Long");@header("Status: 414 Request-URI Too Long");@header("Connection: Close");@exit;}
//通过QUERY_STRING取得完整的传入数据，然后取得url=之后的所有值，兼容性更好
$t_url = preg_replace('/^url=(.*)$/i','$1',$_REQUEST["url"]);
$web=preg_replace('/(http:\/\/|https:\/\/|)*/','',$_REQUEST["url"]);
if($t_url==base64_encode(base64_decode($t_url))){$t_url= base64_decode($t_url);}
$urlhttp= strtolower(substr($_REQUEST["url"],0,7));
$urlhttps=strtolower(substr($_REQUEST["url"],0,8));
if($urlhttp=='http://'||$urlhttps=='https://'){$slurl=$_REQUEST["url"];}else{$slurl='http://'.$t_url;}
$ch = curl_init();
$timeout = 3;
curl_setopt ($ch, CURLOPT_URL, $slurl);
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
$contents = curl_exec($ch);
$pburl = array('baidu.com','baidu1.com','baidu2.com','baidu3.com','baidu4.com');//屏蔽一些网址不做跳转
if(false == $contents || in_array($web,$pburl)){?>
<html xmlns="http://www.w3.org/1999/xhtml" lang="zh-CN"><head>
<meta charset="utf-8" />
<title>输入的网址错误</title>
<style type="text/css">
body{width:100%;margin:0 auto;font-family:'Microsoft YaHei';color:#5d5d5d;font-size:16px;}
a{color:#00F;text-decoration:underline;font-size:16px;}
a:hover{color:#F00;}
</style>
</head>
<body>
<div style="height:140px;background-color:#f0fbff;border-bottom:1px solid #c0c0c0;border-top:1px solid #c0c0c0;">
<div style=" margin:28px 0 0 500px;">
<div style="font-size:25px;">输入的网址有误</div>    
<div style="font-size:18px;line-height:32px;">你访问的网址不存在或为非法网址禁止访问<br /><a href="/">返回首页</a> &nbsp;&nbsp;&laquo;<a href="javascript:history.back(-1);">返回上一页</a></div></div></div>
</body></html>
<?php }else{?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="robots" content="noindex, nofollow" />
<script>
function link_jump()
{//禁止其他网站使用我们的跳转页面
var MyHOST = new RegExp("<?php echo $_SERVER['HTTP_HOST'];?>");
if(!MyHOST.test(document.referrer)) {location.href="http://" + MyHOST;}
location.href="<?php echo $slurl;?>";}
setTimeout(link_jump, 3000);//延时3S跳转，可自行修改延时时间
setTimeout(function(){window.opener=null;window.close();},50000);//延时50S关闭跳转页面，用于文件下载后不会关闭跳转页的问题
</script>
<title><?php echo $web;?></title>
<style type="text/css">
body{background:#555}.loading{-webkit-animation:fadein 2s;-moz-animation:fadein 2s;-o-animation:fadein 2s;animation:fadein 2s}@-moz-keyframes fadein{from{opacity:0}to{opacity:1}}@-webkit-keyframes fadein{from{opacity:0}to{opacity:1}}@-o-keyframes fadein{from{opacity:0}to{opacity:1}}@keyframes fadein{from{opacity:0}to{opacity:1}}.spinner-wrapper{position:absolute;top:0;left:0;z-index:300;height:100%;min-width:100%;min-height:100%;background:rgba(255,255,255,0.93)}.spinner-text{position:absolute;top:45%;left:50%;margin-left:-100px;margin-top:2px;color:#000;letter-spacing:1px;font-size:20px;font-family:Arial}.spinner{position:absolute;top:45%;left:50%;display:block;margin-left:-160px;width:1px;height:1px;border:20px solid rgba(255,0,0,1);-webkit-border-radius:50px;-moz-border-radius:50px;border-radius:50px;border-left-color:transparent;border-right-color:transparent;-webkit-animation:spin 1.5s infinite;-moz-animation:spin 1.5s infinite;animation:spin 1.5s infinite}@-webkit-keyframes spin{0%,100%{-webkit-transform:rotate(0deg) scale(1)}50%{-webkit-transform:rotate(720deg) scale(0.6)}}@-moz-keyframes spin{0%,100%{-moz-transform:rotate(0deg) scale(1)}50%{-moz-transform:rotate(720deg) scale(0.6)}}@-o-keyframes spin{0%,100%{-o-transform:rotate(0deg) scale(1)}50%{-o-transform:rotate(720deg) scale(0.6)}}@keyframes spin{0%,100%{transform:rotate(0deg) scale(1)}50%{transform:rotate(720deg) scale(0.6)}}
</style>
</head>
<body>
<div class="loading">
  <div class="spinner-wrapper">
    <span class="spinner-text"><?php echo $web;?> 页面加载中，请稍候...</span>
    <span class="spinner"></span>
  </div>
</div>
<?php }?>

将以上代码保存为go.php上传到网站根目录即可。跳转示例：路径/go.php?go=跳转的网址

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