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# ftp_nb_fget

(PHP 4 >= 4.3.0, PHP 5)

ftp_nb_fget -- Retrieves a file from the FTP server and writes it to an open file (non-blocking)

## Description

int ftp_nb_fget ( resource ftp_stream, resource handle, string remote_file, int mode [, int resumepos])

ftp_nb_fget() retrieves remote_file from the FTP server, and writes it to the given file pointer, handle. The transfer mode specified must be either `FTP_ASCII` or `FTP_BINARY`. The difference between this function and the ftp_fget() is that this function retrieves the file asynchronously, so your program can perform other operations while the file is being downloaded.

示範 1.ftp_nb_fget() example
`<?php // open some file for reading $file = 'index.php'; $fp = fopen($file, 'w'); $conn_id = ftp_connect($ftp_server); $login_result = ftp_login($conn_id, $ftp_user_name, $ftp_user_pass); // Initate the download $ret = ftp_nb_fget($conn_id, $fp, $file, FTP_BINARY); while ($ret == FTP_MOREDATA) { // Do whatever you want echo "."; // Continue downloading... $ret = ftp_nb_continue($conn_id); } if ($ret != FTP_FINISHED) { echo "There was an error downloading the file..."; exit(1); } // close filepointer fclose($fp); ?>`

Returns `FTP_FAILED`, `FTP_FINISHED`, or `FTP_MOREDATA`.

See also ftp_nb_get(), ftp_nb_continue(), ftp_fget(), and ftp_get().

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