Using WordPress ‘comments_open’ PHP filter

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The comments_open WordPress PHP filter checks if the current post is open for comments.

Usage

apply_filters('comments_open', $open, $post_id);

Parameters

  • $open (bool) – Whether the current post is open for comments.
  • $post_id (int) – The post ID.

More information

See WordPress Developer Resources: comments_open

Examples

Disable comments on a specific post

add_filter('comments_open', 'disable_comments_on_specific_post', 10, 2);

function disable_comments_on_specific_post($open, $post_id) {
  if ($post_id == 123) { // Replace 123 with the post ID you want to disable comments for
    return false;
  }
  return $open;
}

Close comments on older posts

add_filter('comments_open', 'close_comments_on_older_posts', 10, 2);

function close_comments_on_older_posts($open, $post_id) {
  $post_date = get_post($post_id)->post_date;
  $days_old = (time() - strtotime($post_date)) / 86400; // Calculate days since post date

  if ($days_old > 30) { // Close comments on posts older than 30 days
    return false;
  }
  return $open;
}

Open comments for logged-in users only

add_filter('comments_open', 'comments_for_logged_in_users_only', 10, 2);

function comments_for_logged_in_users_only($open, $post_id) {
  if (!is_user_logged_in()) {
    return false;
  }
  return $open;
}

Disable comments on posts with specific tags

add_filter('comments_open', 'disable_comments_on_specific_tags', 10, 2);

function disable_comments_on_specific_tags($open, $post_id) {
  $tags_to_disable = array('no-comments', 'private'); // List of tags to disable comments for
  $post_tags = wp_get_post_tags($post_id, array('fields' => 'slugs')); // Get the slugs of post tags

  if (array_intersect($tags_to_disable, $post_tags)) {
    return false;
  }
  return $open;
}

Enable comments on specific post types

add_filter('comments_open', 'enable_comments_on_specific_post_types', 10, 2);

function enable_comments_on_specific_post_types($open, $post_id) {
  $post_type = get_post_type($post_id);
  $allowed_post_types = array('custom_type_1', 'custom_type_2'); // List of post types to allow comments

  if (in_array($post_type, $allowed_post_types)) {
    return true;
  }
  return $open;
}