สอบถามเกี่ยวกับ if elseif ถ้าเข้าเงือนไขแล้วให้ทำการ redirect ค๊ะ

if(isset($_POST["submit"]))
{

if ( $status == "OK" )
   {
     <form action='https://www.paypal.com/cgi-bin/webscr' method='post'>
     <input type='hidden' name='cmd' value='_xclick'>
     <input type='hidden' name='business' value='$seller'>
     <input type='hidden' name='undefined_quantity' value='1'>
     <input type='hidden' name='item_name' value='$item_name'>
     <input type='hidden' name='item_number' value='$id'>
     <input type='hidden' name='amount' value='$withdraw'>
     <input type='hidden' name='quantity' value='1'>
     <input type='hidden' name='custom' value='complete'>
     <input type='image' border='0' name='submit' src='http://www.paypalobjects.com/en_US/i/btn/btn_buynow_LG.gif'>
     </form>
   }
else
    {
      echo " status not OK ";
    }

}