Ticket #19739: 19739.3.diff

wp-comments-post.php

@@ -36 +36 @@
         wp_die( __('Sorry, comments are closed for this item.') );
 } elseif ( 'trash' == $status ) {
-        do_action('comment_on_trash', $comment_post_ID);
-        exit;
+        /**
+         * Allow comments on trashed posts.
+         *
+         * Allow comments on trashed posts, per #19739.
+         *
+         * @since 4.1.0
+         *
+         * @param int  $comment_post_ID The post_id for comments to be enabled on.
+         */
+        if ( !apply_filters( 'allow_comment_on_trash', false, $comment_post_ID ) ){
+                do_action('comment_on_trash', $comment_post_ID);
+                exit;
+        }
 } elseif ( !$status_obj->public && !$status_obj->private ) {
-        do_action('comment_on_draft', $comment_post_ID);
-        exit;
+        /**
+         * Allow comments on draft posts.
+         *
+         * Allow comments on draft posts, per #19739.
+         *
+         * @since 4.1.0
+         *
+         * @param int  $comment_post_ID The post_id for comments to be enabled on.
+         */
+        if ( !apply_filters( 'allow_comment_on_draft', false, $comment_post_ID ) ){
+                do_action('comment_on_draft', $comment_post_ID);
+                exit;
+        }
 } elseif ( post_password_required($comment_post_ID) ) {
         do_action('comment_on_password_protected', $comment_post_ID);
         exit;