how to add queries from 2 diferrent form using php - php

Question

I want to make a cofirm command page, that user after select the produse he cofirm the comand using the CONFIRM FORM, then to redirection him to the cofirm page, where he must write their dates to cofirm the command(the user dates)
So after i have a array in page cart.php
$cofirmaComanda .='<form action="cofirma_comanda.php" method="post">
<input name="prettotal" type="hidden" value="'. $pricetotal .'">
<input name="produseID" type="hidden" value="'. $item_id .'">
<input name="produseNume" type="hidden" value="'. $product_name .'">
<input name="size" type="hidden" value="'. $my_ArraySize .'">
<input name="cantitate" type="hidden" value="' . $each_item['quantity'] .'">
<input name="produse" type="hidden" value="'. $item_id .'">
<input type="submit" name="CofirmaComanda" value="cofirma_comanda"></form>';
then the cofirm page
<?php
session_start(); // Start session first thing in script
// Script Error Reporting
error_reporting(E_ALL);
ini_set('display_errors', '1');
// Connect to the MySQL database
include "storescripts/connect_to_mysql.php";
?>
<?php
$pretTotal = $_POST["prettotal"];
$PRODUSE = $_POST["produseID"];
$produseNume = $_POST["produseNume"];
$size = $_POST["size"];
$cantitate = $_POST["cantitate"];
echo "ID: ".$PRODUSE."<br>";
echo "nume produs selectat: ".$produseNume." <br>";
echo $pretTotal." preata total in LEI<br>";
echo $cantitate." cantitate<br>";
echo $size." dimensiune<br>";
// Filter Function -------------------------------------------------------------------
function filterFunction ($var) {
$var = nl2br(htmlspecialchars($var));
$var = str_replace("/", "\\\\", $var);
$var = preg_replace("~/~", "\\\\", $var);
return $var;
}
$pretTotal = filterFunction($pretTotal);
$PRODUSE = filterFunction($PRODUSE);
$produseNume = filterFunction($produseNume);
$size = filterFunction($size);
$cantitate = filterFunction($cantitate);
if(isset($_SESSION["sumbitDateClienti"])){
$nume = $_POST["nume_client"];
$comanda = 'IDprodus: '.$PRODUSE.' / produseNume: '.$produseNume.' / cantitate: '.$cantitate.' / dimensiune: '.$size.' ';
$stmt = $con->prepare("INSERT comanda (pret_comanda, comanda) VALUES (?, ?)");
// TODO check that $stmt creation succeeded
// "s" means the database expects a string
$stmt->bind_param("ss", $pretTotal, $comanda);
$stmt->execute();
if($stmt->execute()) {
echo "<strong>succes</strong> pagina a fost creata\n titlu: n<a href='admin_index_istorie.php'><strong>Inapoi la pagina de modificare istorie</strong></a>";
}
else {
echo "eroare";
}
$stmt->close();
}
else{
echo "completeaza forum pentru a finaliza comanda";
}
?>
the form on the cofirm page
<form action="" method="post">
nume: <input name="nume_client" type="text">
<input type="hidden" name="prettotal" value="<?php echo $_POST['prettotal'] ?>">
<input type="hidden" name="produseID" value="<?php echo $_POST['produseID']; ?>">
<input type="hidden" name="produseNume" value="<?php echo $_POST['produseNume']; ?>">
<input type="hidden" name="cantitate" value="<?php echo $_POST['cantitate']; ?>">
<input type="hidden" name="size" value="<?php echo $_POST['size']; ?>">
<input type="submit" name="sumbitDateClienti" value="ok">
</form>
I am stucking in this problem because if i put a name on the field is noting doing, doesnt insert the query in the database, and also doesnt give me the else return with the error