php-pagebuilder Code

<?php
session_start();
$user_ID=$_SESSION[user_ID];
if (!$user_ID || $user_ID=='0')
{
  header('location: index.php');
  die('Login failed');
}
require("util.php");
$sql = new MySQL_class;
$sql->Create("generator");
$esql = new MySQL_class;
$esql->Create("generator");
if ($_GET[part]) { $_SESSION[var_part] = $_GET[part]; }
$screen=$_SESSION[var_screen];
$DatabaseID=$_SESSION[var_DatabaseID];
$part=$_SESSION[var_part];
?>
<?php
$sql = new MySQL_class;
$sql->Create("generator");
$part=($_POST['part']);
$type=quote($_POST['type']);
$table=quote($_POST['table']);
	$field = $sql->data[table];
	if ($field <> 0) {
	  $esql->QueryItem("tables and `TableID`=$field");
if ($esql->data[LNR]==0) {die ('No valid data in \'Table\''); }
	}
$link=quote($_POST['link']);
	$field = $sql->data[link];
	if ($field <> 0) {
	  $esql->QueryItem("screen and `screen`=$field");
if ($esql->data[LNR]==0) {die ('No valid data in \'Link\''); }
	}
$title=quote($_POST['title']);
$code=quote($_POST['code']);
$order=quote($_POST['order']);
$sql->Update("UPDATE `part` SET
`type`=$type,
`table`=$table,
`link`=$link,
`title`=$title,
`code`=$code,
`order`=$order WHERE `part`='$part' AND `screen`='$screen'");
$affected_rows = $sql->a_rows;
echo "<P><FONT FACE=\"Verdana, sans-serif\"><FONT SIZE=1 STYLE=\"font-size: 8pt\">";
echo "Er is/zijn $affected_rows records gewijzigd<BR>";
echo "$type<BR>";
echo "$table<BR>";
echo "$link<BR>";
echo "$title<BR>";
echo "$code<BR>";
echo "</P>";
if ($affected_rows=1) {
	echo "<script>window.opener.location.reload(true)</script>";
	echo "<script>window.close(self)</script>";
}
$_SESSION[last_62]=$order;
?>
<INPUT TYPE=BUTTON VALUE="Sluiten" onClick="window.opener.location.reload(true);self.close()">