If an uploaded file encounter an error, a FileException instance like this is thrown:

The file "5MB.zip" exceeds your upload_max_filesize ini directive (limit is 2048 KiB).

The message template is choose thanks to this code part:

The issue is we don't have any access to the related PHP constant and we have to check the exception compare with string comparison which is not really reliable.

Two solutions:

1. The simplest one: Add the PHP error constant on the FileException to make it accessible from the catch.
2. The best (IMO): Create new exception based on the PHP error constant such as IniSizeFileException or FormSizeFileException.

What do you think?