WordPress博客文章自动标签(关键词)添加内链

很多朋友都在问有没有自动将文章中出现的标签加上链接？然后多次探索探究找到了自动将文章中出现的标签加链接的方法。这方法很简单，将下面的代码添加到主题的 functions.php 即可：

提示：functions.php一般在以下目录 网站/wp-content/themes/当前主题/functions.php

//WordPress文章关键词自动内链
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){
	$match_num_from = 1;	//一个标签少于几次不链接
	$match_num_to = 1;	//一个标签最多链接几次
	$posttags = get_the_tags();
	if ($posttags) {
		usort($posttags, "tag_sort");
		foreach($posttags as $tag) {
			$link = get_tag_link($tag->term_id);
			$keyword = $tag->name;
			//链接代码
			$cleankeyword = stripslashes($keyword);
			$url = "".addcslashes($cleankeyword, '$')."";
			$limit = rand($match_num_from,$match_num_to);
			//不链接代码
			$content = preg_replace( '|(<a[^>]+>)(.*)<pre.*?>('.$ex_word.')(.*)<\/pre>(</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 . ')(?!(([^<>]*?)>)|([^>]*?))\'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);

你可以根据自己的需要修改文章标签的链接数。