(PHP 4 = 4.3.0) ftp_nb_get() retrieves remote_file from the FTP server, and saves it to local_file locally. The transfer mode specified must be either FTP_ASCII or FTP_BINARY. The difference between this function and the ftp_get() is that this function retrieves the file asynchronously, so your program can perform other operations while the file is being downloaded. 成功した場合に TRUE 、失敗した場合に FALSE を返します。 例 1 ftp_nb_get() example 例 2Resuming a download with ftp_nb_get() 例 3 Resuming a download at position 100 to a new file with ftp_nb_get() In the example above, "newfile" is 100 bytes smaller than "README" on the FTP server because we started reading at offset 100. If we have not have disabled FTP_AUTOSEEK, the first 100 bytes of newfile will be '\0'. See also ftp_nb_fget(), ftp_nb_continue(), ftp_get() and ftp_fget().