public function disp_image()
       {
           if($_SESSION['uwierz_uzyt'])
           {
               echo "<h3>Obrazki:</h3>";
               echo "<div style=\"width: 400px; margin: auto; text-align: left;\">
               <form method=\"post\" action=\"upload.php\"enctype=\"multipart/form-data\">";
               $flr = opendir('../upload_files/');
      
               while(false !== ($img = readdir($flr)))
               {
                   if ($img != "." && $img != "..")
                   {
                       echo "<input type=\"radio\" method=\"post\" name=\"pic\" value=\"$img\"/>$img";
                   }
               }
               closedir($flr);
               echo "
   <input type=\"submit\" name=\"imgadd\" value=\"Dodaj obrazek\">&nbsp;&nbsp;<input type=\"submit\" name=\"imgdel\" value=\"Usuń obrazek\">&nbsp;&nbsp;<input type=\"submit\" name=\"imgsee\" value=\"Podgląd\">";
               echo "</form></div>";
               echo '
  
   <a href="index.php">Wstecz';
           }
       }

$img = glob("../upload_files/*.jpg");
echo $img;

   $dir = '../upload_files/';
            $flr= glob($dir.'*.jpg');
            foreach($flr as $file)
            {
                echo "<input type=\"radio\" method=\"post\" name=\"pic\" value=\"$file\"/>$file<br>";
            }