WordPress标签是一个很好的功能。充分利用标签不仅可以加强文章之间的相关性，改善用户体验，还可以借助标签加强站点内部的SEO链。
如何使用以下内容：只需将代码添加到主题functions.php文章中。
自动标记WordPress文章
/* 自动为文章添加标签 */
add_action('save_post', 'auto_add_tags');
function auto_add_tags(){
$tags = get_tags( array('hide_empty' => false) );
$post_id = get_the_ID();
$post_content = get_post($post_id)->post_content;
if ($tags) {
foreach ( $tags as $tag ) {
// 如果文章内容出现了已使用过的标签，自动添加这些标签
if ( strpos($post_content, $tag->name) !== false)
wp_set_post_tags( $post_id, $tag->name, true );
}
}
WordPress 标签自动添加内链
/* 自动为文章内的标签添加内链 */
$match_num_from = 1; //一篇文章中同一个标签少于几次不自动链接
$match_num_to = 1; //一篇文章中同一个标签最多自动链接几次
function tag_sort($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 = ""; $limit = rand($match_num_from,$match_num_to); $content = preg_replace( '|(<a[^>]+>)(.*)('.$ex_word.')(.*)(</a[^>]*>)|U'.$case, '$1$2$4$5', $content); $content = preg_replace( '|()|U'.$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;
}
add_filter('the_content','tag_link',1);
