UPDATE MySQL avec array

$Fr_Valider = "1";
$Fr_Pseudo = $_SESSION["Connexion"]["user_log"]['Pseudo'];
$array_lib = !empty($_POST['Fr_Libelle']) ? $_POST['Fr_Libelle'] : NULL;
$array_qte = !empty($_POST['Fr_Quantite']) ? $_POST['Fr_Quantite'] : 0;
$array_unt = !empty($_POST['Fr_PrixUnit']) ? $_POST['Fr_PrixUnit'] : 0;
$array_tot = !empty($_POST['Fr_PrixTotal']) ? $_POST['Fr_PrixTotal'] : 0;
$FR_PDO = $pdo->prepare("UPDATE tb_user_voucher_test SET Libelle=:array_lib, Quantite=:array_qte, PrixUnit=:array_unt, PrixTotal=:array_tot, Valider=:Fr_Valider WHERE Pseudo = '" . $Fr_Pseudo . "' ");

foreach($array_lib as $key => $value)
	{
	if ($array_qte[$key] <> 0)
		{
		$FR_PDO->bindParam(":array_lib", $value);
		$FR_PDO->bindParam(":array_qte", $array_qte[$key]);
		$FR_PDO->bindParam(":array_unt", $array_unt[$key]);
		$FR_PDO->bindParam(":array_tot", $array_tot[$key]);
		$FR_PDO->bindParam(":Fr_Valider", $Fr_Valider);
		$FR_PDO->execute();
		}
	}