move_uploaded_file()'s return codes are not allways obious !

Unable to move '/var/tmp/phpuuAVJv' to '/home/me/website.com/upload/images/hello.png'

will apear if your disk is full, or the webserver (www user) exeeded it's disk qouta. (probably some others)

i dont know if its a bug (just not iplemented) or a feature (to hide from 3rd parties details about the system or about the specific error) ?

it happend to me that after several months of successful operation, the disk filled up and qouta exeeded.

it took me long time, finding out why all the sudden my scripts didnt work properly anymore.