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");
$project=$_SESSION[var_project];
$sheet=$_SESSION[var_sheet];
?>
<?php
$SheetID=($_POST['SheetID']);
$SheetTable=quote($_POST['SheetTable']);
$Code=quote($_POST['Code']);
$Ordering=quote($_POST['Ordering']);
$Restrictions=quote($_POST['Restrictions']);
$Link=quote($_POST['Link']);
$sql->Update("UPDATE `sheet` SET
`SheetTable`=$SheetTable,
`Code`=$Code,
`Ordering`=$Ordering,
`Restrictions`=$Restrictions,
`Link`=$Link WHERE `project`='$project' AND `sheet`='$sheet'");
$affected_rows = $sql->a_rows;
echo "<P><FONT FACE=\"Verdana, sans-serif\"><FONT SIZE=1 STYLE=\"font-size: 8pt\">";
echo "Er is/zijn $affected_rows records gewijzigd<BR>";
echo "$sheet<BR>";
echo "$Name<BR>";
echo "$Code<BR>";
echo "</P>";
if ($affected_rows=1) {
	echo "<script>window.opener.location.reload(true)</script>";
	echo "<script>window.close(self)</script>";
}
?>
<INPUT TYPE=BUTTON VALUE="Close" onClick="window.opener.location.reload(true);self.close()">