I know that PHP can upload the file to the server using the information in the $_FILE global, but I haven't found out how it, and I, can find the full file path.
I would like to find the path on the client side. I know than when I upload a file to my server using PHP, I can upload a file from any location on my client computer. It would seem reasonable to me that to do this, the full path name needs to be available. The question is how to obtain this path so I can assign it to the src element of the img.
The full path on the client is not available to you. The browser acts as an intermediary, allowing the user to select a file, and sending the contents to the server, but never allowing the page to know any more than it absolutely must.
Also, once the file has been uploaded, surely you want the img src to point to the image on the server, not the local original?