Ako zabezpecit PHP uploadovaci skript – PHP – Fórum – Programujte.com

Chcem tento skript zabezpecit tak aby sa uploadovat dali iba .rar a .zip subory, vsetky ostatne budu zakazane, prosim poradte

<font color="#FFFFFF">

<?php

require('header.html');

 if($_REQUEST["odoslane"]==1){

  if(move_uploaded_file($_FILES['file']['tmp_name'],$_FILES['file']['name']))

   echo("<center>File <b>".$_FILES['file']['name']."</b> has been uploaded.</center>");

                             }  

  else{

?>

</font>

<form  method="POST" ENCTYPE="multipart/form-data" action="<?php echo $_SERVER["PHP_SELF"] ?>">

 <table border="1" align="center" valign="center">

  <tr>

   <td><font color="#FFFFFF">RAR or ZIP file</font></td>

   <td><input type="file" name="file"></td>

  </tr>

  <tr>

  <td colspan="2">

    <input type="hidden" name="odoslane" value="1">

    <p align="center"><input type="submit" value="Send">

  </td>    

  </tr>

 </table> 

</form>

<?php

}

?>

</body>

</html>

$_FILES['file']['type'] skus si poyreta potom tam pridaj podmienku

alebo reg. vyrazmi podla pripony