ftp_nb_fget

(PHP 4 >= 4.3.0, PHP 5, PHP 7)

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

int ftp_nb_fget ( resource $ftp_stream, resource $handle, string $remote_file, int $mode [, int $resumepos = 0 ] )

ftp_nb_fget() retrieves a remote file from the FTP server.

The difference between this function and ftp_fget() is that this function retrieves the file asynchronously, so your program can perform other operations while the file is being downloaded.

Parameters:

ftp_stream

The link identifier of the FTP connection.

handle

An open file pointer in which we store the data.

remote_file

The remote file path.

mode

The transfer mode. Must be either FTP_ASCII or FTP_BINARY.

resumepos

The position in the remote file to start downloading from.

Returns:

Returns FTP_FAILED or FTP_FINISHED or FTP_MOREDATA.

Examples:

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);
?>