syntax error, unexpected 'readonly' (T_STRING), expecting function (T_FUNCTION) or const (T_CONST)

enter image description here I'm trying to decode qr code form local storage but get following error syntax error, unexpected 'readonly' (T_STRING), expecting function (T_FUNCTION) or const (T_CONST)

namespace Crm\Http\Controllers;

use Illuminate\Routing\Controller;
use Illuminate\Support\Facades\Storage;
use Libern\QRCodeReader\QRCodeReader;

class ScanQrCodeController extends Controller
{

    // public function __construct(string $imagePath)
    // {
    //     $imagePath = $this->imgPath;
    // }
  
        public  function scanQrCode()
        {
            $qrCodeScan = new QRCodeReader();
            
            $data = Storage::exists('public/uploads/companies/1/1/AVL0CQ/testQR.png');
            $url  = Storage::url('public/uploads/companies/1/1/AVL0CQ/testQR.png');
            $imgPath = (string) 'storage/uploads/companies/1/1/AVL0CQ/testQR.png';
            $qrCodeData = $qrCodeScan->decode($imgPath);
             
            return [
                "qr file exists " => $data,
                "url " => $url,
                //  "qr code output"  => $qrCodeData
            ];

        }

}

via Chebli Mohamed