phpbb\install\helper\iohandler\iohandler_interface::add_error_message PHP Method

    public function add_error_message($error_title, $error_description = false);

 /**
  * {@inheritdoc}
  */
 public function run()
 {
     $this->db->sql_return_on_error(true);
     $languages = $this->language_helper->get_available_languages();
     $installed_languages = array();
     foreach ($languages as $lang_info) {
         $lang_pack = array('lang_iso' => $lang_info['iso'], 'lang_dir' => $lang_info['iso'], 'lang_english_name' => htmlspecialchars($lang_info['name']), 'lang_local_name' => htmlspecialchars($lang_info['local_name'], ENT_COMPAT, 'UTF-8'), 'lang_author' => htmlspecialchars($lang_info['author'], ENT_COMPAT, 'UTF-8'));
         $this->db->sql_query('INSERT INTO ' . LANG_TABLE . ' ' . $this->db->sql_build_array('INSERT', $lang_pack));
         $installed_languages[] = (int) $this->db->sql_nextid();
         if ($this->db->get_sql_error_triggered()) {
             $error = $this->db->sql_error($this->db->get_sql_error_sql());
             $this->iohandler->add_error_message($error['message']);
         }
     }
     $sql = 'SELECT * FROM ' . PROFILE_FIELDS_TABLE;
     $result = $this->db->sql_query($sql);
     $insert_buffer = new \phpbb\db\sql_insert_buffer($this->db, PROFILE_LANG_TABLE);
     while ($row = $this->db->sql_fetchrow($result)) {
         foreach ($installed_languages as $lang_id) {
             $insert_buffer->insert(array('field_id' => $row['field_id'], 'lang_id' => $lang_id, 'lang_name' => strtoupper(substr($row['field_name'], 6)), 'lang_explain' => '', 'lang_default_value' => ''));
         }
     }
     $this->db->sql_freeresult($result);
     $insert_buffer->flush();
 }