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"];
}

$title = $_POST["title"];
$keywords = $_POST["keywords"];
$description = $_POST["description"];
$baslik = $_POST["baslik"];
$hood = $_POST["hood"];
$icerik = $_POST["icerik"];
$iceriktwo = $_POST["iceriktwo"];
$kate= $_POST["kate"];
$altkate = $_POST["altkate"];
$sar = $_POST["sira"];

echo $kate;

function replace_tr($baslik) {
$baslik = trim($baslik);
$search = array('Ç','ç','Ğ','ğ','ı','İ','Ö','ö','Ş','ş','Ü','ü','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','R','S','T','U','V','Y','Z',' ','.','?',"'",' ','(',')');
$replace = array('c','c','g','g','i','i','o','o','s','s','u','u','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','r','s','t','u','v','y','z','-','','',"",'','(',')');

$newcode = str_replace($search,$replace,$baslik);
return $newcode;
}

$aurl = replace_tr($baslik);

$stmt = $db->prepare('SELECT count(*) FROM menu WHERE url = ?');
$stmt->execute([$aurl]);
$count = $stmt->fetchColumn();


if($count > 0){
	$url = $aurl.'1';
}else{
	$url = $aurl;
}




$stmt = $db->prepare("insert into menu (lang, root_id, title, keywords, description, sira, kate, altkate, baslik, hood, url, icerik, iceriktwo)value(:lang, :root_id, :title, :keywords, :description, :sira, :kate, :altkate, :baslik, :hood, :url, :icerik, :iceriktwo)");
$stmt->bindParam(':lang', $lang, PDO::PARAM_STR);
$stmt->bindParam(':root_id', $root_id, PDO::PARAM_STR);
$stmt->bindParam(':title', $title, PDO::PARAM_STR);
$stmt->bindParam(':keywords', $keywords, PDO::PARAM_STR);
$stmt->bindParam(':description', $description, PDO::PARAM_STR);
$stmt->bindParam(':sira', $sar, PDO::PARAM_STR);
$stmt->bindParam(':kate', $kate, PDO::PARAM_STR);
$stmt->bindParam(':altkate', $altkate, PDO::PARAM_STR);
$stmt->bindParam(':baslik', $baslik, PDO::PARAM_STR);
$stmt->bindParam(':hood', $hood, PDO::PARAM_STR);
$stmt->bindParam(':url', $url, PDO::PARAM_STR);
$stmt->bindParam(':icerik', $icerik, PDO::PARAM_STR);
$stmt->bindParam(':iceriktwo', $iceriktwo, PDO::PARAM_STR);
$stmt->execute();

header('Location: ../pages/sayfalar.php?s='.$kate);

?>