/**
 * 如何实现 WordPress 指定文章或页面允许评论昵称/内容带连接地址 - 龙笑天下
 * https://www.ilxtx.com/allow-comment-link-in-some-pages.html
 */
define('ALLOW_PAGES', 'Id1,Id2');
function lxtx_allow_comment_link( $comment ) {
    $post_ID = $comment["comment_post_ID"];
    $allow_posts = ALLOW_PAGES ? explode(',', ALLOW_PAGES) : array();
    if(!in_array($post_ID,$allow_posts)){
        $links = '/http://|https://|www.|.com/u';
	    if (preg_match($links, $comment['comment_author']) || preg_match($links, $comment['comment_content'])) {
	        wp_die('别啊，昵称和评论里面有链接会怀孕的哟！！');
	    }
    }
    return $comment;
}
add_filter('preprocess_comment', 'lxtx_allow_comment_link');