====== FileUploadRequiredRule ======

Input validation rule that tests for a file upload.  Similar to [[RequiredRule]] for file uploads.

===== Example =====

<code php>
$form->addRule (new FileUploadRequiredRule ('fieldName'));
</code>

This example checks that the file upload specified by "fieldName" exists (checks that a file was uploaded).

===== Additional Information =====

  * [[RequiredRule]]
  * [[wact:api:validation:rule:catalog|Validation Rules]]
  * WACT [[wact:Form Validation]]