public static function destroyProgress($job) 
    {
        // Get temporary file path
        $file = $tmpdir.$job.'.sonustmp';

        // Check if file exists
        if (is_file($file)) 
        {
            // Delete file
            $output = unlink($tmpdir.$job.'.sonustmp');
            return $output;
        } else {
            return false;
        }
    }