MAX_FILE_SIZE es erroneo.  MAX_FILE_SIZE erroneous (Bug #40387).
and equivalent locations in other formats, it is stated that
browsers take the value of a MAX_FILE_SIZE form field into  This
information is repeated elsewhere on the web and in books, but
appears to originate from the PHP documentation (it does not
appear in terms of other server-side technologies).  There is
nothing in any of the HTML, HTTP or related specs to indicate
that this is the case (in particular RFC 1867 which introduced
file uploads to HTML doesn't mention it, so it isn't even a case
of a kludge that was mentioned in the first RFC and then
dropped) nor does it make sense in the context of the HTML specs
(there is nothing to indicate any relationship between that
particular hidden input and the file input). The only statements
about hidden fields I could find in any of them was warnings in
the security considerations sections against user-agents basing
any file-related operations on anything mentioned in a hidden
No browsers appear