http://us2.php.net/manual/en/function.move-uploaded-file.php
"Note: move_uploaded_file() is both safe mode and open_basedir aware.
However, restrictions are placed only on the destination path as to allow
the moving of uploaded files in which filename may conflict with such
restrictions. move_uploaded_file() ensures the safety of this operation by
allowing only those files uploaded through PHP to be moved."
Thanks for your answer. I had seen this note before, but I don't
understand it (I also looked at the french translation but I also don't
understand it).
move_uploaded_file is "safe-mode aware" - it doesn't care whether safe-mode is on or off.
You can only use move_uploaded_file like:
move_uploaded_file($_FILE['blah']['tmp_name'], $destination);
Check that your destination directory is writable.