SiteSettingsForm::getDatabaseErrors

protected SiteSettingsForm::getDatabaseErrors(array $database, $settings_file)

protected function getDatabaseErrors(array $database, $settings_file) {
  $errors = install_database_errors($database, $settings_file);
  $form_errors = array_filter($errors, function($value) {
    // Errors keyed by something other than an integer already are linked to
    // form elements.
    return is_int($value);
  });

  // Find the generic errors.
  $errors = array_diff_key($errors, $form_errors);

  if (count($errors)) {
    $error_message = [
      '#type' => 'inline_template',
      '#template' => '{% trans %}Resolve all issues below to continue the installation. For help configuring your database server, see the <a href="https://www.drupal.org/getting-started/install">installation handbook</a>, or contact your hosting provider.{% endtrans%}{{ errors }}',
      '#context' => [
        'errors' => [
          '#theme' => 'item_list',
          '#items' => $errors,
        ],
      ],
    ];

    // These are generic errors, so we do not have any specific key of the
    // database connection array to attach them to; therefore, we just put
    // them in the error array with standard numeric keys.
    $form_errors[$database['driver'] . '][0'] = $this->renderer->renderPlain($error_message);
  }

  return $form_errors;
}