1 file.inc backdrop_tempnam($directory, $prefix)

Creates a file with a unique filename in the specified directory.

PHP's tempnam() does not return a URI like we want. This function will return a URI if given a URI, or it will return a filepath if given a filepath.

Compatibility: normal paths and stream wrappers.


$directory: The directory where the temporary filename will be created.

$prefix: The prefix of the generated temporary filename. Note: Windows uses only the first three characters of prefix.

Return value

The new temporary filename, or FALSE on failure.:

See also



Related topics


core/includes/file.inc, line 2719
API for handling file uploads and server file management.


function backdrop_tempnam($directory, $prefix) {
  $scheme = file_uri_scheme($directory);

  if ($scheme && file_stream_wrapper_valid_scheme($scheme)) {
    $wrapper = file_stream_wrapper_get_instance_by_scheme($scheme);

    if ($filename = tempnam($wrapper->getDirectoryPath(), $prefix)) {
      return $scheme . '://' . backdrop_basename($filename);
    else {
      return FALSE;
  else {
    // Handle as a normal tempnam() call.
    return tempnam($directory, $prefix);