function file_directory_temp

Gets the path of system-appropriate temporary directory.

Related topics

File

core/includes/file.inc, line 2742

API for handling file uploads and server file management.

Code

function file_directory_temp() {
  $site_config = config('system.core');
  $temporary_directory = $site_config->get('file_temporary_path');

  if (empty($temporary_directory)) {
    $directories = array();

    // Has PHP been set with an upload_tmp_dir?
    if (ini_get('upload_tmp_dir')) {
      $directories[] = ini_get('upload_tmp_dir');
    }

    // Operating system specific dirs.
    if (substr(PHP_OS, 0, 3) == 'WIN') {
      $directories[] = 'c:\\windows\\temp';
      $directories[] = 'c:\\winnt\\temp';
    }
    else {
      $directories[] = '/tmp';
    }
    // PHP may be able to find an alternative tmp directory.
    $directories[] = sys_get_temp_dir();

    foreach ($directories as $directory) {
      if (is_dir($directory) && is_writable($directory)) {
        $temporary_directory = $directory;
        break;
      }
    }

    if (empty($temporary_directory)) {
      // If no directory has been found default to 'files/tmp'.
      $temporary_directory = $site_config->get('file_public_path') . '/tmp';

      // Windows accepts paths with either slash (/) or backslash (\), but will
      // not accept a path which contains both a slash and a backslash. Since
      // the 'file_public_path' variable may have either format, we sanitize
      // everything to use slash which is supported on all platforms.
      $temporary_directory = str_replace('\\', '/', $temporary_directory);
    }
  }

  return $temporary_directory;
}