WordPress纯代码实现自动为文章添加标签及标签内链接,在WordPress中,可以使用PHP代码在文章发布时自动添加标签及标签内链接。需要在主题的functions.php文件中添加以下代码:
代码1:该文章设置的标签都加链接
/** * WordPress 自动为文章标签添加该标签的链接 */ function wpkj_auto_add_tag_link($content){ $limit = 1; // 设置同一个标签添加几次链接 $posttags = get_the_tags(); if ($posttags) { foreach($posttags as $tag) { $link = get_tag_link($tag->term_id); $keyword = $tag->name; $cleankeyword = stripslashes($keyword); $url = '<a target="_blank" href="'.$link.'" title="'.str_replace('%s', addcslashes($cleankeyword, '$'), __('View all posts in %s')).'">'.addcslashes($cleankeyword, '$').'</a>'; $regEx = '\'(?!((<.*?)|(<a.*?)))('. $cleankeyword . ')(?!(([^<>]*?)>)|([^>]*?</a>))\'s'; $content = preg_replace($regEx,$url,$content,$limit); } } return $content; } add_filter( 'the_content', 'wpkj_auto_add_tag_link', 1 );
你可以根据自己的需要修改第7行的数值。
代码2:该文章设置的标签加链接(限制次数)
/** * WordPress 自动为文章标签添加该标签的链接 */ $match_num_from = 1; // 一个标签在文章中出现少于多少次不添加链接 $match_num_to = 2; // 一篇文章中同一个标签添加几次链接 add_filter('the_content','wpkj_tag_link',1); //按长度排序 function wpkj_tag_sort($a, $b){ if ( $a->name == $b->name ) return 0; return ( strlen($a->name) > strlen($b->name) ) ? -1 : 1; } //为符合条件的标签添加链接 function wpkj_tag_link($content){ global $match_num_from,$match_num_to; $posttags = get_the_tags(); if ($posttags) { usort($posttags, "wpkj_tag_sort"); foreach($posttags as $tag) { $link = get_tag_link($tag->term_id); $keyword = $tag->name; //链接的代码 $cleankeyword = stripslashes($keyword); $url = "<a href=\"$link\" title=\"".str_replace('%s',addcslashes($cleankeyword, '$'),__('查看与【%s】相关的文章'))."\""; $url .= ' target="_blank"'; $url .= ">".addcslashes($cleankeyword, '$')."</a>"; $limit = rand($match_num_from,$match_num_to); //不链接的代码 $ex_word = ''; $case = ''; $content = preg_replace( '|(<a[^>]+>)(.*)('.$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; }
请根据自己的需要,修改代码 5 – 6行的数字。