Copying files between two Debian Servers using php - php

Question

My php website is hosted in Debain Machine and I want to move a file from that Machine to another Debain which is connected through VPN.
I tried shell_exec and scp , as mentioned here.
<?php
$output = shell_exec('scp file1.txt dvader#deathstar.com:somedir');
echo "<pre>$output</pre>";
?>
I also tried using SFTP
<?php
class SFTPConnection
{
private $connection;
private $sftp;
public function __construct($host, $port=22)
{
$this->connection = #ssh2_connect($host, $port);
if (! $this->connection)
throw new Exception("Could not connect to $host on port $port.");
}
public function login($username, $password)
{
if (! #ssh2_auth_password($this->connection, $username, $password))
throw new Exception("Could not authenticate with username $username " .
"and password $password.");
$this->sftp = #ssh2_sftp($this->connection);
if (! $this->sftp)
throw new Exception("Could not initialize SFTP subsystem.");
}
public function uploadFile($local_file, $remote_file)
{
$sftp = $this->sftp;
$stream = #fopen("ssh2.sftp://$sftp$remote_file", 'w');
if (! $stream)
throw new Exception("Could not open file: $remote_file");
$data_to_send = #file_get_contents($local_file);
if ($data_to_send === false)
throw new Exception("Could not open local file: $local_file.");
if (#fwrite($stream, $data_to_send) === false)
throw new Exception("Could not send data from file: $local_file.");
#fclose($stream);
}
}
try
{
$sftp = new SFTPConnection("localhost", 22);
$sftp->login("username", "password");
$sftp->uploadFile("/tmp/to_be_sent", "/tmp/to_be_received");
}
catch (Exception $e)
{
echo $e->getMessage() . "\n";
}
?>
Simply My problem is that I am not able to move a file from one machine, where my php applicaton is working , to another machine which is connected through VPN.

Answer 1

I installed proftpd and created a user as mentioned here,
Please note default port is 21. And make sure you restart proftpd:
service proftpd restart
The code I used to upload a file is:
index.php
<?php
ini_set('display_errors',1);
ini_set('display_startup_errors',1);
error_reporting(-1);
$file = 'a.txt';
$remote_file = 'b.txt';
$conn_id = ftp_connect('www.xxx.com',21);
$login_result = ftp_login($conn_id, "username","password");
if (ftp_put($conn_id, $remote_file, $file, FTP_ASCII)) {
echo "successfully uploaded $file\n";
} else {
echo "There was a problem while uploading $file\n";
die();
}
ftp_close($conn_id);
?>
Here a.txt is present in the same directory of index.php.
It will copy the file to the folder you mentioned for that particular user to access and name it b.txt.