Wordpress 添加外链go跳转页面

添加这个功能的主要目的是网站外链有可能会影响自己的博客权重，部分外链还可能存在风险。

所以添加这个go跳转页面能很好的解决这个问题。像知乎网站也有这个功能，然后我自己的导航网址也有go跳转页。

下面就是怎么添加wordpress的外链 GO跳转页面

1、在wordpress根目录添加1个go.php文件

然后在go.php放入下面的代码

<?php
if(strlen($_SERVER['REQUEST_URI']) > 255 ||
strpos($_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="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
<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;
}
}
//延时 2S 跳转，可自行修改延时时间
setTimeout(link_jump, 300000);
//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();}, 500000);
</script>
<title><?php echo $title;?></title>
<style>body{margin:0;padding:0 30px;background:#fff;font-size:12px}img{border:none}a{text-decoration:none;cursor:pointer;outline:0}a:hover{text-decoration:underline}a,a:link,a:visited{color:#1e5494}a.btn_blue:focus{border-color:#93d4fc;box-shadow:0 0 5px #60caff}a.btn_blue{display:inline-block;padding:6px 25px;margin:0;font-size:14px;font-weight:700;text-align:center;border-radius:3px;border:1px solid #0d659b;color:#fff;color:#fff!important;background-color:#238aca;background:-moz-linear-gradient(top,#238aca,#0074bc);background:-webkit-linear-gradient(top,#238aca,#0074bc);filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#238aca', endColorstr='#0074bc');-ms-filter:"progid:DXImageTransform.Microsoft.gradient(startColorstr='#238aca', endColorstr='#0074bc')"}a.btn_blue:hover{text-decoration:none;background-color:#238aca;background:-moz-linear-gradient(top,#2a96d8,#0169a9);background:-webkit-linear-gradient(top,#2a96d8,#0169a9);filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#2a96d8', endColorstr='#0169a9');-ms-filter:"progid:DXImageTransform.Microsoft.gradient(startColorstr='#2a96d8', endColorstr='#0169a9')"}a.btn_blue:active{background-color:#238aca;background:-moz-linear-gradient(top,#0074bc,#238aca);background:-webkit-linear-gradient(top,#0074bc,#238aca);filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#0074bc', endColorstr='#238aca');-ms-filter:"progid:DXImageTransform.Microsoft.gradient(startColorstr='#0074bc', endColorstr='#238aca')";outline:0}.remind_block{overflow:hidden}.remind_block .remind_content{overflow:hidden}.remind_block .remind_title{margin-bottom:10px;padding-top:3px;font-weight:700;font-size:20px;font-family:"Microsoft YaHei","lucida Grande",Verdana}.remind_block .remind_detail{line-height:1.5;font-size:16px;color:#535353}.warning .remind_title{color:#16a085}.container{max-width:640px;margin:0 auto;padding-top:25px}.header{margin-bottom:5px}.footer{margin-top:18px;text-align:center;color:#a0a0a0;font-size:10px}.content{border:1px solid #bbb;box-shadow:0 0 3px #d4d4d4}.c-container{padding:30px}.c-footer{padding:10px 15px;background:#f1f1f1;border-top:1px solid #bbb;overflow:hidden}.c-footer-a1,.c-footer-a2{float:left}.c-footer-a2{margin:8px 0 0 15px}.safety-url{margin-bottom:15px;padding-bottom:15px;border-bottom:1px solid #dfdfdf;word-wrap:break-word;word-break:break-all}</style>
<style></style>
</head>
<body>
 
<div class="container">
<div class="content">
<div class="c-container warning">
<div id="remind_block" class="remind_block" style="height: 180px;">
<div class="remind_content">
<div class="remind_title">
您将要访问：
</div>
<div class="remind_detail">
<div class="safety-url">
<?php echo $url;?>
</div>
<span style="color:#CC0000;font-weight:800;">访问提示：</span><br/>您即将离开「www.saiita.com.cn」，该网页可能包含未知的安全隐患，请注意您的账号和财产安全。
</div>
</div>
</div>
</div>
</div>
<div class="c-footer">
<a href="<?php echo $url;?>" rel="nofollow" class="c-footer-a1 btn_blue">继续访问</a><a class="c-footer-a2" href="/" rel="nofollow">返回主页</a>
</div>
</div>
<div class="footer">Copyright © SaiitaのBlog</div>  
</body>
 
</html>

2、在网站主题文件夹下搜索functions.php

在functions.php合理的位置放入下面代码

add_filter('the_content','the_content_nofollow',999);
function the_content_nofollow($content) {
  preg_match_all('/<a(.*?)href="(.*?)"(.*?)>/',$content,$matches);
  if($matches){
    foreach($matches[2] as $val){
      if(strpos($val,'://')!==false && strpos($val,home_url())===false && !preg_match('/\.(jpg|jepg|png|ico|bmp|gif|tiff)/i',$val)){
        $content=str_replace("href=\"$val\"", "href=\"".home_url()."/go.php?url=$val\" ",$content);
      }
    }
  }
  return $content;
}