WordPress文章自動提取tag並添加連接

咱們在編寫文章時,常常須要添加一些標籤關鍵詞的連接,這樣不只能夠優化咱們的內鏈,對用戶來講也能夠參照相關的文章,若是對文章的關鍵字進行手動添加連接,那樣對咱們來講太麻煩了,並且在標籤關鍵詞不少的狀況下咱們是記不住的,今天就向你們介紹如何讓咱們的wordpress文章自動添加標籤關鍵詞的連接:php

打開咱們主題的functions.php文件添加以下代碼:wordpress

//鏈接數量
 $match_num_from = 1;  //一個關鍵字少於多少不替換
 $match_num_to = 10; //一個關鍵字最多替換

 //鏈接到WordPress的模塊
 add_filter('the_content','tag_link',1);

 //按長度排序
 function tag_sort($a, $b){
     if ( $a->name == $b->name ) return 0;
     return ( strlen($a->name) > strlen($b->name) ) ? -1 : 1;
 }

 //改變標籤關鍵字
 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;

            //鏈接代碼
             $cleankeyword = stripslashes($keyword);
             $url = "<a href=\"$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);

            //不鏈接的代碼
             $content = preg_replace( '|(<a[^>]+>)(.*)('.$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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