(PHP3 >= 3.0.13, PHP4 >= 4.0b4)
ftp_fget -- Downloads a file from the FTP server and saves to an
     open file.
Description
int ftp_fget (int ftp_stream, int fp, string remote_file, int mode)
     Returns true on success, false on error.
     ftp_fget() retrieves remote_file
     from the FTP server, and writes it to the given file pointer,
     fp.  The transfer mode
     specified must be either FTP_ASCII or FTP_BINARY.