wordpress给外链自动添加nofollow

跟自己需求更改吧

add_filter('the_content', 'auto_nofollow'); //nofollow文章内容的站外链接  
   
add_filter('comment_text', 'auto_nofollow'); //nofollow评论内容的站外链接  
   
function auto_nofollow($content) {  
    //return stripslashes(wp_rel_nofollow($content));  
   
    return preg_replace_callback('/<a>]+/', 'auto_nofollow_callback', $content);  
}  
   
function auto_nofollow_callback($matches) {  
    $link = $matches[0];  
    $site_link = get_bloginfo('url');  
   
    if (strpos($link, 'rel') === false) {  
        $link = preg_replace("%(href=S(?!$site_link))%i", 'rel="nofollow" $1', $link);  
    } elseif (preg_match("%href=S(?!$site_link)%i", $link)) {  
        $link = preg_replace('/rel=S(?!nofollow)S*/i', 'rel="nofollow"', $link);  
    }  
    return $link;  
}

add_filter('the_content', 'auto_nofollow'); //nofollow文章内容的站外链接

add_filter('comment_text', 'auto_nofollow'); //nofollow评论内容的站外链接

function auto_nofollow($content) {

//return stripslashes(wp_rel_nofollow($content));

return preg_replace_callback('/<a>]+/', 'auto_nofollow_callback', $content);

}

function auto_nofollow_callback($matches) {

$link = $matches[0];

$site_link = get_bloginfo('url');

if (strpos($link, 'rel') === false) {

$link = preg_replace("%(href=S(?!$site_link))%i", 'rel="nofollow" $1', $link);

} elseif (preg_match("%href=S(?!$site_link)%i", $link)) {

$link = preg_replace('/rel=S(?!nofollow)S*/i', 'rel="nofollow"', $link);

}

return $link;

}