function file_unmanaged_copy

Copies a file to a new location without invoking the file API.

This is a powerful function that in many ways performs like an advanced version of copy().

• Checks if $source and $destination are valid and readable/writable.
• Checks that $source is not equal to $destination; if they are an error is reported.
• If file already exists in $destination either the call will error out, replace the file or rename the file based on the $replace parameter.
• Provides a fallback using realpaths if the move fails using stream wrappers. This can occur because PHP's copy() function does not properly support streams if safe_mode or open_basedir are enabled. See https://bugs.php.net/bug.php?id=60456

Parameters

$source: A string specifying the filepath or URI of the source file.

$destination: A URI containing the destination that $source should be copied to. The URI may be a bare filepath (without a scheme). If this value is omitted, Drupal's default files scheme will be used, usually "public://".

$replace: Replace behavior when the destination file already exists:

• FILE_EXISTS_REPLACE - Replace the existing file.
• FILE_EXISTS_RENAME - Append _{incrementing number} until the filename is unique.
• FILE_EXISTS_ERROR - Do nothing and return FALSE.

Return value

The path to the new file, or FALSE in the event of an error.

See also

file_copy()

Related topics

File

drupal/core/includes/file.inc, line 626

API for handling file uploads and server file management.

Code

function file_unmanaged_copy($source, $destination = NULL, $replace = FILE_EXISTS_RENAME) {
  $original_source = $source;

  // Assert that the source file actually exists.
  if (!file_exists($source)) {

    // @todo Replace drupal_set_message() calls with exceptions instead.
    drupal_set_message(t('The specified file %file could not be copied because no file by that name exists. Please check that you supplied the correct filename.', array(
      '%file' => $original_source,
    )), 'error');
    if (($realpath = drupal_realpath($original_source)) !== FALSE) {
      watchdog('file', 'File %file (%realpath) could not be copied because it does not exist.', array(
        '%file' => $original_source,
        '%realpath' => $realpath,
      ));
    }
    else {
      watchdog('file', 'File %file could not be copied because it does not exist.', array(
        '%file' => $original_source,
      ));
    }
    return FALSE;
  }

  // Build a destination URI if necessary.
  if (!isset($destination)) {
    $destination = file_build_uri(drupal_basename($source));
  }

  // Prepare the destination directory.
  if (file_prepare_directory($destination)) {

    // The destination is already a directory, so append the source basename.
    $destination = file_stream_wrapper_uri_normalize($destination . '/' . drupal_basename($source));
  }
  else {

    // Perhaps $destination is a dir/file?
    $dirname = drupal_dirname($destination);
    if (!file_prepare_directory($dirname)) {

      // The destination is not valid.
      watchdog('file', 'File %file could not be copied because the destination directory %destination is not configured correctly.', array(
        '%file' => $original_source,
        '%destination' => $dirname,
      ));
      drupal_set_message(t('The specified file %file could not be copied because the destination directory is not properly configured. This may be caused by a problem with file or directory permissions. More information is available in the system log.', array(
        '%file' => $original_source,
      )), 'error');
      return FALSE;
    }
  }

  // Determine whether we can perform this operation based on overwrite rules.
  $destination = file_destination($destination, $replace);
  if ($destination === FALSE) {
    drupal_set_message(t('The file %file could not be copied because a file by that name already exists in the destination directory.', array(
      '%file' => $original_source,
    )), 'error');
    watchdog('file', 'File %file could not be copied because a file by that name already exists in the destination directory (%destination)', array(
      '%file' => $original_source,
      '%destination' => $destination,
    ));
    return FALSE;
  }

  // Assert that the source and destination filenames are not the same.
  $real_source = drupal_realpath($source);
  $real_destination = drupal_realpath($destination);
  if ($source == $destination || $real_source !== FALSE && $real_source == $real_destination) {
    drupal_set_message(t('The specified file %file was not copied because it would overwrite itself.', array(
      '%file' => $source,
    )), 'error');
    watchdog('file', 'File %file could not be copied because it would overwrite itself.', array(
      '%file' => $source,
    ));
    return FALSE;
  }

  // Make sure the .htaccess files are present.
  file_ensure_htaccess();

  // Perform the copy operation.
  if (!@copy($source, $destination)) {

    // If the copy failed and realpaths exist, retry the operation using them
    // instead.
    if ($real_source === FALSE || $real_destination === FALSE || !@copy($real_source, $real_destination)) {
      watchdog('file', 'The specified file %file could not be copied to %destination.', array(
        '%file' => $source,
        '%destination' => $destination,
      ), WATCHDOG_ERROR);
      return FALSE;
    }
  }

  // Set the permissions on the new file.
  drupal_chmod($destination);
  return $destination;
}