ftp_nb_fget

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

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

Descrierea

ftp_nb_fget ( resource $ftp , resource $stream , string $remote_filename [, int $mode = FTP_BINARY [, int $offset = 0 ]] ) : int

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.

Parametri

ftp

The link identifier of the FTP connection.

stream

An open file pointer in which we store the data.

remote_filename

The remote file path.

mode

The transfer mode. Must be either FTP_ASCII or FTP_BINARY.

offset

The position in the remote file to start downloading from.

Valorile întoarse

Returns FTP_FAILED or FTP_FINISHED or FTP_MOREDATA.

Istoricul schimbărilor

Versiune Descriere
7.3.0 The mode parameter is now optional. Formerly it has been mandatory.

Exemple

Example #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);

// Initiate the download
$ret ftp_nb_fget($conn_id$fp$fileFTP_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);
?>

A se vedea și

  • ftp_nb_get() - Retrieves a file from the FTP server and writes it to a local file (non-blocking)
  • ftp_nb_continue() - Continues retrieving/sending a file (non-blocking)
  • ftp_fget() - Downloads a file from the FTP server and saves to an open file
  • ftp_get() - Downloads a file from the FTP server

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User Contributed Notes 1 note

up
5
pilif at pilif dot ch
19 years ago
If you want to monitor the progress of the download, you may use the filesize()-Function.

But note: The results of said function are cached, so you'll always get 0 bytes. Call clearstatcache() before calling filesize() to determine the actual size of the downloaded file.

This may have performance implications, but if you want to provide the information, there's no way around it.

Above sample extended:

<?php
// get the size of the remote file
$fs = ftp_size($my_connection, "test");

// Initate the download
$ret = ftp_nb_get($my_connection, "test", "README", FTP_BINARY);
while (
$ret == FTP_MOREDATA) {
  
  
clearstatcache(); // <- this is important
  
$dld = filesize($locfile);
   if (
$dld > 0 ){
      
// calculate percentage
      
$i = ($dld/$fs)*100;
      
printf("\r\t%d%% downloaded", $i);
   }  

  
// Continue downloading...
  
$ret = ftp_nb_continue ($my_connection);
}
if (
$ret != FTP_FINISHED) {
   echo
"There was an error downloading the file...";
   exit(
1);
}
?>

Philip
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