WordPress 文章关键词自动添加链接 WP 主题优化增强 function 文件实用功能代码段

宝藏归属：教程  说明书 发表观点：前往评论 浏览次数：14 次 更新时间：2023年8月26日 16:22:34

WordPress 文章页面适当添加关键词内链链接有利于 SEO 优化，同时方便读者查看所有相关关键词的文章，区分英文与中文关键词可以对每个关键词进行细节设置，荒岛本次带来 WordPress 文章关键词自动添加链接的教程，只要将下面的代码添加到主题的「functions.php」文件即可。宝藏来自荒岛 - 一座藏有宝藏的小岛-https://x-imagine.com/wordpress-article-keywords-automatically-add-links.html

// 荒岛一座藏有宝藏的小岛
$match_num_from = 1;
$match_num_to ='chain_n';
add_filter('the_content','tag_link',1);

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 = $tag->name;
			if (preg_match_all('|(<h[^>]+>)(.*?)'.$keyword.'(.*?)(</h[^>]*>)|U', $content, $matchs)) {continue;}
			if (preg_match_all('|(<a[^>]+>)(.*?)'.$keyword.'(.*?)(</a[^>]*>)|U', $content, $matchs)) {continue;}

			$cleankeyword = stripslashes($keyword);
			$url = "<a href=\"$link\" title=\"".str_replace('%s',addcslashes($cleankeyword, '$'),__('查看与 %s 相关的文章', 'begin' ))."\"";
			$url .= ' target="_blank"';
			$url .= ">".addcslashes($cleankeyword, '$')."</a>";
			$limit = rand($match_num_from,$match_num_to);
			global $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;
}