Can anyone suggest how using the form validation rules I can say the following:-
If no file is uploaded - then create a rule to say 'no file uploaded' using the form validator library.
I am using CodeIgniter 2.
For instance - it is simple to validate on a text input field using the following, but I cannot understand how this is done with upload (that uses the $_FILES array rather than $_POST)
eg. $this->form_validation->set_rules('title', 'Title', 'required'); // input field named 'title' is required