相信有很多博主跟我一样，经常遇到一些带有外链的评论，而对于seo来说，这不并不友好，今天来整理下解决办法。
具体的解决方案有很多，今天先分享下评论外链转内链跳转的方法。
代码部署
1、讲以下代码复制，创建个文件并命名为go.php或自定义文件名，放在站点根目录。
<?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"]);
//此处可以自定义一些特别的外链，不需要可以删除以下5行
if($t_url=="sheruo" ) {
$t_url="https://sheruo.com";
} elseif($t_url=="baidu") {
$t_url="https://www.baidu.com/";
}
//数据处理
if(!empty($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 $title;?></title>
<style type="text/css">
body{background:#555}.loading{-webkit-animation:fadein 2s;-moz-animation:fadein 2s;-o-animation:fadein 2s;animation:fadein 2s}@-moz-keyframes fadein{from{opacity:0}to{opacity:1}}@-webkit-keyframes fadein{from{opacity:0}to{opacity:1}}@-o-keyframes fadein{from{opacity:0}to{opacity:1}}@keyframes fadein{from{opacity:0}to{opacity:1}}.spinner-wrapper{position:absolute;top:0;left:0;z-index:300;height:100%;min-width:100%;min-height:100%;background:rgba(255,255,255,0.93)}.spinner-text{position:absolute;top:45%;left:50%;margin-left:-100px;margin-top:2px;color:#000;letter-spacing:1px;font-size:20px;font-family:Arial}.spinner{position:absolute;top:45%;left:50%;display:block;margin-left:-160px;width:1px;height:1px;border:20px solid rgba(255,0,0,1);-webkit-border-radius:50px;-moz-border-radius:50px;border-radius:50px;border-left-color:transparent;border-right-color:transparent;-webkit-animation:spin 1.5s infinite;-moz-animation:spin 1.5s infinite;animation:spin 1.5s infinite}@-webkit-keyframes spin{0%,100%{-webkit-transform:rotate(0deg) scale(1)}50%{-webkit-transform:rotate(720deg) scale(0.6)}}@-moz-keyframes spin{0%,100%{-moz-transform:rotate(0deg) scale(1)}50%{-moz-transform:rotate(720deg) scale(0.6)}}@-o-keyframes spin{0%,100%{-o-transform:rotate(0deg) scale(1)}50%{-o-transform:rotate(720deg) scale(0.6)}}@keyframes spin{0%,100%{transform:rotate(0deg) scale(1)}50%{transform:rotate(720deg) scale(0.6)}}
</style>
</head>
<body>
<div class="loading">
<div class="spinner-wrapper">
<span class="spinner-text">页面加载中，请稍候...</span>
<span class="spinner"></span>
</div>
</div>
</body>
</html>2.添加伪静态规则
# 外链跳转伪静态 php版本
rewrite ^/go/(.*)$ /go.php?url=$1 last; #注意go.php的实际路径，默认为网站根目录代码来源：张戈博客
3.模版函数添加跳转。主题函数functions.php文件加入下列代码。
//文章外链跳转伪静态版
add_filter('the_content','link_jump',999);
function link_jump($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) && !preg_match('/(ed2k|thunder|Flashget|flashget|qqdl):\/\//i',$val)){
$content=str_replace("href=\"$val\"", "href=\"".home_url()."/go/".base64_encode($val)."\"' target='_blank' rel='external nofollow'",$content);
}
}
}
return $content;
}
//WordPress评论者的链接新窗口打开
function get_comment_author_link_new($return, $author, $comment_ID = 0) {
$comment = get_comment( $comment_ID );
$url = get_comment_author_url( $comment );
$author = get_comment_author( $comment );
if ( empty( $url ) || 'http://' == $url )
$return = $author;
else
$return = "<a href='".home_url()."/go/".base64_encode($url)."' target='_blank' rel='external nofollow' class='url'>$author</a>";
return $return;
}
add_filter('get_comment_author_link', 'get_comment_author_link_new', 10, 3);保存，试试是否ok拉。
2019-12-17更新，添加评论内容链接跳转。
修改上方代码如下，其实只是加个代码add_filter(‘comment_text’,’link_jump’,999);
//文章外链跳转伪静态版
add_filter('the_content','link_jump',999);
add_filter('comment_text','link_jump',999);
function link_jump($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) && !preg_match('/(ed2k|thunder|Flashget|flashget|qqdl):\/\//i',$val)){
$content=str_replace("href=\"$val\"", "href=\"".home_url()."/go/".base64_encode($val)."\"' target='_blank' rel='external nofollow'",$content);
}
}
}
return $content;
}
//WordPress评论者的链接新窗口打开
function get_comment_author_link_new($return, $author, $comment_ID = 0) {
$comment = get_comment( $comment_ID );
$url = get_comment_author_url( $comment );
$author = get_comment_author( $comment );
if ( empty( $url ) || 'http://' == $url )
$return = $author;
else
$return = "<a href='".home_url()."/go/".base64_encode($url)."' target='_blank' rel='external nofollow' class='url'>$author</a>";
return $return;
}
add_filter('get_comment_author_link', 'get_comment_author_link_new', 10, 3);