function file_save_data

Saves a file to the specified destination and creates a database entry.

Parameters

string $data: A string containing the contents of the file.

string|null $destination: (optional) A string containing the destination URI. This must be a stream wrapper URI. If no value or NULL is provided, a randomized name will be generated and the file will be saved using Drupal's default files scheme, usually "public://".

int $replace: (optional) The replace behavior when the destination file already exists. Possible values include:

• FileSystemInterface::EXISTS_REPLACE: Replace the existing file. If a managed file with the destination name exists, then its database entry will be updated. If no database entry is found, then a new one will be created.
• FileSystemInterface::EXISTS_RENAME: (default) Append _{incrementing number} until the filename is unique.
• FileSystemInterface::EXISTS_ERROR: Do nothing and return FALSE.

Return value

\Drupal\file\FileInterface|false A file entity, or FALSE on error.

See also

\Drupal\Core\File\FileSystemInterface::saveData()

File

core/modules/file/file.module, line 580

Defines a "managed_file" Form API field and a "file" field for Field module.

Code

function file_save_data($data, $destination = NULL, $replace = FileSystemInterface::EXISTS_RENAME) {
  $user = \Drupal::currentUser();
  if (empty($destination)) {
    $destination = \Drupal::config('system.file')
      ->get('default_scheme') . '://';
  }

  /** @var \Drupal\Core\StreamWrapper\StreamWrapperManagerInterface $stream_wrapper_manager */
  $stream_wrapper_manager = \Drupal::service('stream_wrapper_manager');
  if (!$stream_wrapper_manager
    ->isValidUri($destination)) {
    \Drupal::logger('file')
      ->notice('The data could not be saved because the destination %destination is invalid. This may be caused by improper use of file_save_data() or a missing stream wrapper.', [
      '%destination' => $destination,
    ]);
    \Drupal::messenger()
      ->addError(t('The data could not be saved because the destination is invalid. More information is available in the system log.'));
    return FALSE;
  }
  try {
    $uri = \Drupal::service('file_system')
      ->saveData($data, $destination, $replace);

    // Create a file entity.
    $file = File::create([
      'uri' => $uri,
      'uid' => $user
        ->id(),
      'status' => FILE_STATUS_PERMANENT,
    ]);

    // If we are replacing an existing file re-use its database record.
    // @todo Do not create a new entity in order to update it. See
    //   https://www.drupal.org/node/2241865.
    if ($replace == FileSystemInterface::EXISTS_REPLACE) {
      $existing_files = \Drupal::entityTypeManager()
        ->getStorage('file')
        ->loadByProperties([
        'uri' => $uri,
      ]);
      if (count($existing_files)) {
        $existing = reset($existing_files);
        $file->fid = $existing
          ->id();
        $file
          ->setOriginalId($existing
          ->id());
        $file
          ->setFilename($existing
          ->getFilename());
      }
    }
    elseif ($replace == FileSystemInterface::EXISTS_RENAME && is_file($destination)) {
      $file
        ->setFilename(\Drupal::service('file_system')
        ->basename($destination));
    }
    $file
      ->save();
    return $file;
  } catch (FileException $e) {
    return FALSE;
  }
}