# PHP ftp_nb_get() Function

PHP FTP Reference

## Example

Download a file from the FTP server, and save it into a local file (non-blocking):

<?php
// connect and login to FTP server
$ftp_server = "ftp.example.com";
$ftp_conn = ftp_connect($ftp_server) or die("Could not connect to $ftp_server");
$login = ftp_login($ftp_conn, $ftp_username, $ftp_userpass);
$local_file = "local.zip";
$server_file = "server.zip";
// initiate download
$d = ftp_nb_get($ftp_conn, $local_file, $server_file, FTP_ASCII)
while ($d == FTP_MOREDATA)
{
// do whatever you want
// continue downloading
$d = ftp_nb_continue($ftp_conn);
}
if ($d != FTP_FINISHED)
{
echo "Error downloading $server_file";
exit(1);
}
// close connection
ftp_close($ftp_conn);
?>

## Definition and Usage

The ftp_nb_get() function gets (downloads) a file from the FTP server, and saves it into a local file (non-blocking).

Tip: This function (as opposite to ftp_get()) retrieves the file asynchronously, so you can perform other operations while the file is being downloaded.

## Syntax

ftp_nb_get(ftp_connection,local_file,server_file,mode,startpos);

Parameter | Description
--- | ---
ftp_connection | Required. Specifies the FTP connection to use
local_file | Required. Specifies the local file path (will be overwritten if the file already exists)
server_file | Required. Specifies the server file to download
mode | Required. Specifies the transfer mode. Possible values: FTP_ASCII or FTP_BINARY
startpos | Optional. Specifies the position in the remote file to start downloading from

## Technical Details

Return Value:

This function returns one of the following values:

- FTP_FAILED (send/receive failed)
- FTP_FINISHED (send/receive completed)
- FTP_MOREDATA (send/receive in progress)

PHP Version: | 4.3+

PHP FTP Reference

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