在文章中给一些关键词添加内链，对于SEO确实有一定的帮助，如果我们一个个的手动添加的话，未免太麻烦了，将下面的代码放入主题根目录下的function.php最底部即可
//标签内链//连接数量$match_num_from = 1; //一个关键字少于多少不替换$match_num_to = 2; //一个关键字最多替换//连接到WordPress的模块add_filter('the_content','tag_link',1);//按长度排序function tag_sort($a, $b){if ( $a->name == $b->name ) return 0;return ( strlen($a->name) > strlen($b->name) ) ? -1 : 1;}//改变标签关键字function tag_link($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 = $tag->name;//连接代码$cleankeyword = stripslashes($keyword);$url = "<a href="$link" title="".str_replace('%s',addcslashes($cleankeyword, '$'),__('%s')).""";$url .= ' target="_blank"';$url .= ">".addcslashes($cleankeyword, '$')."</a>";$limit = rand($match_num_from,$match_num_to);//不连接的 代码$content = preg_replace( '|(<a[^>]+>)(.*)('.$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;}