php pdo veri ekleme yardım

if( isset( $_POST['urunekle'] ) )
{
$urun_adi = htmlspecialchars(trim(strip_tags(addslashes(str_replace(array_keys( $substitutions ), $substitutions, $_POST["urun_adi"])))));
$aciklama = htmlspecialchars(trim(strip_tags(addslashes(str_replace(array_keys( $substitutions ), $substitutions, $_POST["aciklama"])))));
$gorsel_link = htmlspecialchars(trim(strip_tags(addslashes(str_replace(array_keys( $substitutions ), $substitutions, $_POST["gorsel_link"])))));
$stok_durumu = htmlspecialchars(trim(strip_tags(addslashes(str_replace(array_keys( $substitutions ), $substitutions, $_POST["stok_durumu"])))));
$fiyat = htmlspecialchars(trim(strip_tags(addslashes(str_replace(array_keys( $substitutions ), $substitutions, $_POST["fiyat"])))));
$marka_id = htmlspecialchars(trim(strip_tags(addslashes(str_replace(array_keys( $substitutions ), $substitutions, $_POST["marka_id"])))));
$urun_kodu = htmlspecialchars(trim(strip_tags(addslashes(str_replace(array_keys( $substitutions ), $substitutions, $_POST["urun_kodu"])))));
$ozel_urunler = htmlspecialchars(trim(strip_tags(addslashes(str_replace(array_keys( $substitutions ), $substitutions, $_POST["ozel_urunler"])))));
$anasayfada_goster = htmlspecialchars(trim(strip_tags(addslashes(str_replace(array_keys( $substitutions ), $substitutions, $_POST["anasayfada_goster"])))));
$urun_videosu = htmlspecialchars(trim(strip_tags(addslashes(str_replace(array_keys( $substitutions ), $substitutions, $_POST["urun_videosu"])))));
$kategori_id = htmlspecialchars(trim(strip_tags(addslashes(str_replace(array_keys( $substitutions ), $substitutions, $_POST["kategori_id"])))));
$durum = htmlspecialchars(trim(strip_tags(addslashes(str_replace(array_keys( $substitutions ), $substitutions, $_POST["durum"])))));
$dil = htmlspecialchars(trim(strip_tags(addslashes(str_replace(array_keys( $substitutions ), $substitutions, $_POST["dil"])))));