abot the weird file upload problems: code

From:	Revista Electrónica de Visión porComputador	Date:	Thu, 01 Jan 1970 00:00:00 +0000
Subject:	abot the weird file upload problems: code
Groups:	php.install
Request:	Send a blank email to php-install+get-3115@lists.php.net to get a copy of this message

html form: <form action="file-upload.php" method="post" enctype="multipart/form-data">

      <INPUT TYPE="hidden" name="MAX_FILE_SIZE" value="15000000">
      <input type="hidden" name="advisor2" value="oak">
      <input type="hidden" name="article2" value="test">
      Send these files:<br>
      <input name="userfile[]" type="file">
      <br>
      <input name="userfile[]" type="file">
      <br>
      <input type="submit" value="Send files" name="submit">
    </form>

php code: for($i=0; $i<2; $i++){ if ($userfile_name[$i]){

     if (is_uploaded_file($userfile[$i])) {
         copy($userfile[$i], "./$userfile_name[$i]");
         if(!$entrega){ $entrega = 1; }
     } else {
         echo "Possible file upload attack: filename '$userfile_name[$i]'.";
     }

} } any ideas? Please, I'm very new in PHP so I need a LOT of constructive criticism Jordi