$urun_query = $db->prepare("SELECT * FROM uretim_urun WHERE urun_id = ?");
$urun_query->execute([$urun_isim]);
$urun = $urun_query->fetchAll();
foreach ($urun as $urun) {}

$birim_query = $db->prepare("SELECT * FROM birim WHERE birim_id = ?");
$birim_query->execute([$birim_isim]);
$birim = $birim_query->fetchAll();
foreach ($birim as $birim) {}

?>