在自己的博客中,随着时间的积累,往往会产生很多内链和外链,这其中包括评论者自己发布的链接,文章中包括的链接等等.业界也流传着一种说法,就是这样不利于SEO优化,不管是真的假的,我们要做的就是实现自动在这些外链中,添加一项跳转链接.
实现代码
首先制作用于美化跳转的go.php页面,存放于网站根目录
<?php
//by https://www.os99.net
$t_url = preg_replace(‘/^url=(.*)$/i’,’$1′,$_SERVER[“QUERY_STRING”]);
if(!empty($t_url)) {
preg_match(‘/(http|https):\/\//’,$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=’//www.os99.net/’;
$title=’参数错误，正在返回首页…’;
}
}
} else {
$title=’参数缺失，正在返回首页…’;
$url=’//www.os99.net/’;
}
?>
<html>
<head>
<meta http-equiv=”Content-Type” content=”text/html; charset=UTF-8″>
<meta http-equiv=”refresh” content=”1;url='<?php echo $url;?>’;”>
<title><?php echo $title;?></title>
<style>
body{background:#2E9AFE}.loading{-webkit-animation:fadein 2s;-moz-animation:fadein 2s;-o-animation:fadein 2s;animation:fadein 2s}@-moz-keyframes fadein{from{opacity:0}to{opacity:1}}@-webkit-keyframes fadein{from{opacity:0}to{opacity:1}}@-o-keyframes fadein{from{opacity:0}to{opacity:1}}@keyframes fadein{from{opacity:0}to{opacity:1}}.spinner-wrapper{position:absolute;top:0;left:0;z-index:300;height:100%;min-width:100%;min-height:100%;background:rgba(255,255,255,0.93)}.spinner-text{position:absolute;top:50%;left:50%;margin-left:-90px;margin-top: 2px;color:#BBB;letter-spacing:1px;font-weight:700;font-size:36px;font-family:Arial}.spinner{position:absolute;top:50%;left:50%;display:block;margin-left:-160px;width:1px;height:1px;border:25px solid rgba(100,100,100,0.2);-webkit-border-radius:50px;-moz-border-radius:50px;border-radius:50px;border-left-color:transparent;border-right-color:transparent;-webkit-animation:spin 1.5s infinite;-moz-animation:spin 1.5s infinite;animation:spin 1.5s infinite}@-webkit-keyframes spin{0%,100%{-webkit-transform:rotate(0deg) scale(1)}50%{-webkit-transform:rotate(720deg) scale(0.6)}}@-moz-keyframes spin{0%,100%{-moz-transform:rotate(0deg) scale(1)}50%{-moz-transform:rotate(720deg) scale(0.6)}}@-o-keyframes spin{0%,100%{-o-transform:rotate(0deg) scale(1)}50%{-o-transform:rotate(720deg) scale(0.6)}}@keyframes spin{0%,100%{transform:rotate(0deg) scale(1)}50%{transform:rotate(720deg) scale(0.6)}}
</style>
</head>
<body>
<div class=”loading”>
<div class=”spinner-wrapper”>
<span class=”spinner-text”>页面加载中,请稍候…</span>
<span class=”spinner”></span>
</div>
</div>
</body>
</html>
接下来修改functions.php文件，文件通常在themes主题目录下，例如，justnews主题路径是/wp-content/themes/justnews/functions.php在文件最后增加：
(替换文章中的链接为跳转链接,并为外链加上nofolow属性.)
//把下面的代码添加在主题的functions.php中
add_filter(‘the_content’,’the_content_nofollow’,999);
function the_content_nofollow($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=$val\” rel=’nofollow'”,$content);
}
}
}
return $content;
}
替换评论中的链接为跳转链接
//把下面的代码添加在主题的functions.php中
add_filter(‘get_comment_author_link’, ‘add_redirect_comment_link’, 5);
add_filter(‘comment_text’, ‘add_redirect_comment_link’, 99);
function add_redirect_comment_link($text = ”){
$text=str_replace(‘href=”‘,%20’href=”‘.get_option(‘home’).’/go.php?url=’, $text);
return $text;
}
