function file_progress_implementation

Determines the preferred upload progress implementation.

Return value

string|false A string indicating which upload progress system is available. Either "apc" or "uploadprogress". If neither are available, returns FALSE.

See also

https://www.drupal.org/node/3397577

File

core/modules/file/file.module, line 736

Code

function file_progress_implementation() {
  @trigger_error(__FUNCTION__ . '() is deprecated in drupal:10.3.0 and is removed from drupal:11.0.0. Use extension_loaded(\'uploadprogress\') instead. See https://www.drupal.org/node/3397577', E_USER_DEPRECATED);
  static $implementation;
  if (!isset($implementation)) {
    $implementation = FALSE;
    // We prefer the PECL extension uploadprogress because it supports multiple
    // simultaneous uploads. APCu only supports one at a time.
    if (extension_loaded('uploadprogress')) {
      $implementation = 'uploadprogress';
    }
  }
  return $implementation;
}