function mainwp_backup_checkpid()
{
$this->secure_request('mainwp_backup_checkpid');
try {
if (!isset($_POST['site_id']) || !MainWP_Utility::ctype_digit($_POST['site_id'])) {
throw new MainWP_Exception('Invalid request');
}
die(json_encode(MainWP_Manage_Sites::backupCheckpid($_POST['site_id'], $_POST['pid'], $_POST['type'], $_POST['subfolder'], $_POST['filename'])));
} catch (MainWP_Exception $e) {
die(json_encode(array('error' => array('message' => $e->getMessage(), 'extra' => $e->getMessageExtra()))));
}
}