Drupal Site Backup

<?php

set_time_limit(0);

ini_set('display_errors',1);
ini_set('display_startup_errors',1);
error_reporting(-1);

$version = $_GET['version'];

if ($version == '7') {
  define('DRUPAL_ROOT', getcwd());
  require_once DRUPAL_ROOT . '/includes/bootstrap.inc';
  drupal_bootstrap(DRUPAL_BOOTSTRAP_FULL);
} else if ($version == '6'){
  require_once './includes/bootstrap.inc';
  drupal_bootstrap(DRUPAL_BOOTSTRAP_FULL);
} else {
  echo "NO_VERSION";
  exit();
}

global $user;
$user = user_load(1);

$filename = 'backup-' . date('Y-m-d-G-i-s') . '.tar.bz2';
$cwd = getcwd();
$fullPath = $cwd . '/' . $filename;


if (!module_exists('backup_migrate')) {
  echo "MISSING_BACKUP_MIGRATE";
  exit();
}



require DRUPAL_ROOT . '/' . drupal_get_path('module', 'backup_migrate') . "/includes/profiles.inc";
require DRUPAL_ROOT . '/' . drupal_get_path('module', 'backup_migrate') . "/includes/destinations.inc";


backup_migrate_get_destination('db');
backup_migrate_get_destination('manual');
$settings = backup_migrate_get_profile('default');

$settings->destination_id = 'manual';
$settings->source_id = 'db';
$backup = backup_migrate_perform_backup($settings);
if ($version == '6')
  $db_backup = $cwd . '/' . $settings->get_destination()->location . '/' . $backup->file_info['filename'] . '.' . implode('.', $backup->ext);
else
  $db_backup = drupal_realpath($settings->get_destination()->location . '/' . $backup->file_info['filename'] . '.' . implode('.', $backup->ext));


exec("mv '$db_backup' '$cwd/'");
exec('tar -cjvf ' . $filename . ' --exclude=settings.php * .h* .g*');

if ($fd = fopen ($fullPath, "r")) {
  $fsize = filesize($fullPath);

  header("Content-Type: application/octet-stream");
  header("Content-Disposition: filename=\"$filename\"");
  header("Content-length: $fsize");
  header("Cache-control: private");
  while(!feof($fd)) {
      $buffer = fread($fd, 2048);
      echo $buffer;
  }
}

unlink($fullPath);
unlink($cwd . '/' . $backup->name . implode('.', $backup->ext));
fclose ($fd);
exit();

?>