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How to automatically add internal links to keywords in WordPress

Jul 13, 2019 pm 02:56 PM

How to automatically add internal links to keywords in WordPress

我们在编写文章时,经常需要添加一些标签关键词的链接,这样不仅可以优化我们的内链,对用户来说也可以参照相关的文章,如果对文章的关键字进行手动添加链接,那样对我们来说太麻烦了,而且在标签关键词很多的情况下我们是记不住的,那怎么如何让WordPress站点的文章自动添加标签链接变为内链呢?其实我们只需要在主题目录下的functions.php文件中添加一段代码就可以实现了。

只需要在模板函数文件【functions.php】添加下面代码:

//自动关键词内链
$match_num_from = 1; //一个关键字少于多少不替换
$match_num_to = 5; //一个关键字最多替换
add_filter(‘the_content’,'tag_link’,1);
function tag_sort($a, $b){
if ( $a->name == $b->name ) return 0;
return ( strlen($a->name) > strlen($b->name) ) ? -1 : 1;
}
function tag_link($content){
global $match_num_from,$match_num_to;
$posttags = get_the_tags();
if ($posttags) {
usort($posttags, “tag_sort”);
foreach($posttags as $tag) {
$link = get_tag_link($tag->term_id);
$keyword = $tag->name;
$cleankeyword = stripslashes($keyword);
$url = “<a href=\”$link\” title=\”".str_replace(‘%s’,addcslashes($cleankeyword, ‘$’),__(‘View all posts in %s’)).”\”";
$url .= ‘ target=”_blank” class=”tag_link”‘;
$url .= “>”.addcslashes($cleankeyword, ‘$’).”</a>”;
$limit = rand($match_num_from,$match_num_to);
$content = preg_replace( ‘|(<a[^>]+>)(.*)(‘.$ex_word.’)(.*)(</a[^>]*>)|U’.$case, ‘$1$2%&&&&&%$4$5′, $content);
$content = preg_replace( ‘|(<img)(.*?)(‘.$ex_word.’)(.*?)(>)|U’.$case, ‘$1$2%&&&&&%$4$5′, $content);
$cleankeyword = preg_quote($cleankeyword,’\”);
$regEx = ‘\’(?!((<.*?)|(<a.*?)))(‘. $cleankeyword . ‘)(?!(([^<>]*?)>)|([^>]*?</a>))\’s’ . $case;
$content = preg_replace($regEx,$url,$content,$limit);
$content = str_replace( ‘%&&&&&%’, stripslashes($ex_word), $content);
}
}
return $content;
}
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上面代码添加到模板函数最后面 ” ?>” 前方,一定要保持格式和符号不要更改,然后更新模板函数,清除浏览器缓存后重新打开一个文章页面就会看的到效果了。

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