//连接数量 $match_num_from = 1;  //一个关键字少于多少不替换 $match_num_to = 10; //一个关键字最多替换 //连接到WordPress的模块 add_filter(‘the_content‘,‘tag_link‘,1); //按长度排序 function tag_sort($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);             $url = "<a href=http://www.mamicode.com/"$link\" title=\"".str_replace(‘%s‘,addcslashes($cleankeyword, ‘$‘),__(‘View all posts in %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; }