<?php

$username = "your_username";
$password = "your_pass";
$url      = 'your_stp_server_url';

// Make our connection
$connection = ssh2_connect($url);

// Authenticate
if (!ssh2_auth_password($connection, $username, $password)) throw new Exception('Unable to connect.');

// Create our SFTP resource
if (!$sftp = ssh2_sftp($connection)) throw new Exception('Unable to create SFTP connection.');

$localDir  = '/path/to/your/local/dir';
$remoteDir = '/path/to/your/remote/dir';

// download all the files
$files    = scandir('ssh2.sftp://' . $sftp . $remoteDir);
if (!empty($files)) {
  foreach ($files as $file) {
    if ($file != '.' && $file != '..') {
      ssh2_scp_recv($connection, "$remoteDir/$file", "$localDir/$file");
    }
  }
}

?>