PHP ftp_nb_fget() Function
Example
Download a file from the FTP server, and save it to an open 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);
$server_file = "somefile.txt";
// open local file to write to
$local_file = "local.txt";
$fp = fopen($local_file,"w");
// initiate download
$d = ftp_nb_fget($ftp_conn, $fp, $server_file, FTP_BINARY)
while ($d == FTP_MOREDATA)
{
// do whatever you want
// continue downloading
$d = ftp_nb_continue($ftp_conn);
}
if ($d != FTP_FINISHED)
{
echo "Error downloading $server_file";
exit(1);
}
// close connection and file handler
ftp_close($ftp_conn);
fclose($fp);
?>
Definition and Usage
The ftp_nb_fget() function gets (downloads) a file from the FTP server, and saves it into an open local file (non-blocking).
Tip: This function (as opposite to ftp_fget()) retrieves the file asynchronously, so you can perform other operations while the file is being downloaded.
Syntax
ftp_nb_fget(ftp_conn, open_file, server_file, mode, startpos);
Parameter Values
| Parameter | Description |
|---|---|
| ftp_conn | Required. Specifies the FTP connection to use |
| open_file | Required. Specifies an open local file in which we store the data |
| server_file | Required. Specifies the server file to download |
| mode | Optional. 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: | One of the following values:
|
|---|---|
| PHP Version: | 4.3+ |
| PHP Changelog: | PHP 7.3 - The mode parameter was made optional. |
❮ PHP FTP Reference
