ftp_nb_fput() uploads the data
from the file pointer
handle until it reaches the end of the file. The
results are stored in
remote_file on the FTP server. The transfer mode specified must be either
FTP_ASCII or FTP_BINARY. The difference between
this function and the ftp_fput() is that this function
uploads the file asynchronously, so your program can perform
other operations while the file is being downloaded.
成功回傳TRUE失敗回傳FALSE。
See also ftp_nb_put(),
ftp_nb_continue(), ftp_put() and
ftp_fput().