Sindbad~EG File Manager

<?php
ob_start();
include "baglan.php";

if(empty(@$_GET["d"])){
  $lang = null;
  $root_id = 0;
}else{
  $lang = $_POST["lang"];
  $root_id = $_POST["root_id"];
}


$sira = $_POST["sira"];
$baslik = $_POST["baslik"];




$stmt = $db->prepare("insert into refkate (lang, root_id, sira, baslik)value(:lang, :root_id, :sira, :baslik)");
$stmt->bindParam(':lang', $lang, PDO::PARAM_STR);
$stmt->bindParam(':root_id', $root_id, PDO::PARAM_STR);
$stmt->bindParam(':baslik', $baslik, PDO::PARAM_STR);
$stmt->bindParam(':sira', $sira, PDO::PARAM_STR);
$stmt->execute();

header('Location: ../pages/referanskate.php');

?>