Automatic Online Update Toolkit

<?php
mysql_connect("mydbserver.com","dbuser","dbpassword") or die(mysql_error());
mysql_select_db("mydb") or die(mysql_error());
switch($_GET["action"]){
 case "check": 
  $res=mysql_query("SELECT * FROM version WHERE projectname='".$_GET["project"]."'");
  $arr=mysql_fetch_array($res);
  echo $arr["actualversion"];
  die();
 break;
 case "setnew": 
  $res=mysql_query("UPDATE version SET actualversion=".$_GET["version"]." WHERE projectname='".$_GET["project"]."'");
  die();
 break;
 default:
  header("location:/");
  die();
  break;
} // switch
?>