In this, one of the fields is to upload a file. I followed some tutorials about file uploading in CodeIgniter successfully, but, in my work, the $_FILES is always empty, and I can't see why. I'm a newbie in this framework.'m developing a form using CodeIgniter. In this, one of the fields is to upload a file. I followed some tutorials about file uploading in CodeIgniter successfully, but, in my work, the $_FILES is always empty, and I can't see why. I'm a newbie in this framework.