WordPress adds nofollow to the outside link address of the article

What is nofollow?

Nofollow is the attribute value of a tag in the HTML page. It’s used to tell search engines “don’t track links on this page” or “don’t track specific links,” that is, it won’t export weights to this link.

It is important for wordless SEO optimization. So it is necessary to add nofolw to the link address if there is an external link address in the article

Add case

Add rel = “nofollow” and do not export your own website weight

<a href="https://www.wpjc.net/" rel="nofollow" >WPTooTutorial network</a>

usage method

Add the following code to the topic functions.php Documents

//Add to the article linknofollow
add_filter('the_content','web589_the_content_nofollow',999);
function web589_the_content_nofollow($content){
	preg_match_all('/href="(.*?)" rel="external nofollow" /',$content,$matches);
	if($matches){
		foreach($matches[1] as $val){
			if( strpos($val,home_url())===false ) $content=str_replace("href="$val"", "href="$val" rel="nofollow" ",$content);
		}
	}
	return $content;
}