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PHP ftp_nb_get() Function

PHP FTP Reference 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 PHP FTP Reference

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