Récupérer la valeur <select>

 
<form method='post'>
<select name="quantite"> 
  <option value="value1" selected> 1</option> 
  <option value="value2" > 2</option>
 <option value="value3"> 3</option>
   <option value="value4">4</option>
   <option value="value5">5</option>
   <option value="value6">6</option>
   <option value="value7">7</option>
   <option value="value8">8</option> 
   <option value="value9">9</option>
</select></form>

function quantite(){
	$connexion=connexion();
	$req="select * from commande where nomPrenomClient='".$_SESSION["nomPrenomClient"]."'";
	$res=$connexion->query($req);
	while($resultat=$res->fetch() ){
		foreach($_SESSION['produits'] as $unIdProduit){ 
		foreach($_POST["quantite"] as $quantite){
			$req1="insert into contenir values (".$res["id"].",".$unIdProduit.",".$quantite.")";
			$conte=$connexion->query($req1);
		    }
		}
	}
	
	}