Display just child pages of a certain page in search results

Hi!

Using a custom code, it might be possible actually.

Try adding this custom code to the functions.php in your theme/child theme directory. Before editing, please make sure to have a full site back-up just in case!

add_filter('asl_query_add_args', 'asl_query_add_args_add', 10, 3);
function asl_query_add_args_add($args, $sd, $options) {
  $post_parent_ids = '1, 2, 3, 4';   // Post parent IDs, comma separated

  // ---- DO NOT EDIT BELOW ----
  global $wpdb;
  $args = array(
    'fields' => '',
    'join' => '',
    'where' => '',
    'orderby' => '',
    'groupby' => ''
  );
  $parents = explode(',', str_replace(' ', '', $post_parent_ids));
  if ( count($parents) > 0 && !empty($parents[0]) )
    $args['where'] = " AND ( $wpdb->posts.post_parent IN (".implode(',', $parents).") ) ";
    
  return $args;  
}

Enter the Parent IDs to the $post_parent_ids variable, comma separated.

Best,
Ernest M.