<?php
// Guzzle POP chain untuk PHP 5.6
// Membutuhkan library guzzle yang mungkin tidak ada

// Try dengan built-in classes
class CI_Session_files_driver {
    public $_ci;
    public $_config;
    public $_sid_regexp;
    public $_file_path;
    public $_file_handle;
    public $_file_new;
    public $_fingerprint;
    public $_cookie_destroy = false;
    
    public function __construct() {
        $this->_file_path = '/tmp/';
    }
}

// Simple payload - just test deserialization
$obj = new stdClass();
$obj->test = 'RCE_TEST';
echo serialize($obj);