Mage2\Install\Controllers\InstallController::index PHP Method

    public function index()
    {
        $result = [];
        foreach ($this->extensions as $ext) {
            if (extension_loaded($ext)) {
                $result[$ext] = 'true';
            } else {
                $result[$ext] = false;
            }
        }
        return view('install.extension')->with('result', $result);
    }