1 common.inc archiver_get_extensions()

Returns a string of supported archive extensions.

Return value

A space-separated string of extensions suitable for use by the file: validation system.


core/includes/common.inc, line 9040
Common functions that many Backdrop modules will need to reference.


function archiver_get_extensions() {
  $valid_extensions = array();
  foreach (archiver_get_info() as $archive) {
    foreach ($archive['extensions'] as $extension) {
      foreach (explode('.', $extension) as $part) {
        if (!in_array($part, $valid_extensions)) {
          $valid_extensions[] = $part;
  return implode(' ', $valid_extensions);