Extracts a file uploaded by means of the "file
selection" field
fieldname
and stores it under
savepath
.
savepath
may be the name of a plain file or an existing directory in
which the file is to be created under its original name. Any
existing file under the same name will be overwritten.
注意 There seems to be no other way to find out the original filename but to store the file using a directory as savepath and check for the basename it was stored under.
The returned array contains the following
fields: