function drupal_tempnam

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.

Parameters

$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

tempnam()

http://drupal.org/node/515192

Related topics

File

drupal/includes/file.inc, line 2498

API for handling file uploads and server file management.

Code

function drupal_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 $scheme . '://' . drupal_basename($filename);
    }
    else {
      return FALSE;
    }
  }
  else {

    // Handle as a normal tempnam() call.
    return tempnam($directory, $prefix);
  }
}