diff --git a/html/data_treatment/AJAX/check_coupon.php b/html/data_treatment/AJAX/check_coupon.php
new file mode 100644
index 0000000000000000000000000000000000000000..8510860eb770a8e5855eee51a3405eab6c8e37fd
--- /dev/null
+++ b/html/data_treatment/AJAX/check_coupon.php
@@ -0,0 +1,30 @@
+<?php
+
+include("../connect_database.php");
+
+// Récupérer le code promo envoyé par la requête AJAX
+$receivedPromoCode = $_POST['promoCode'];
+
+// Préparer la requête SQL
+$sql = "SELECT discount FROM coupons WHERE couponCode = ?";
+
+// Préparer et exécuter la déclaration
+$stmt = $conn->prepare($sql);
+$stmt->bind_param("s", $receivedPromoCode);
+$stmt->execute();
+$stmt->bind_result($discount);
+
+// Vérifier si le code promo existe dans la base de données
+if ($stmt->fetch()) {
+    // Renvoyer la remise associée
+    echo $discount;
+} else {
+    // Si le code promo n'est pas trouvé, renvoyer 0
+    echo 0;
+}
+
+// Fermer la connexion
+$stmt->close();
+$conn->close();
+
+?>
\ No newline at end of file
diff --git a/startbootstrap-agency-gh-pages/checkout.php b/startbootstrap-agency-gh-pages/checkout.php
index b57734867e2770f164124021720ad4821565c5e0..04b75677bc9b3a1e59fb3e20d0ba1b2bc93af2a2 100644
--- a/startbootstrap-agency-gh-pages/checkout.php
+++ b/startbootstrap-agency-gh-pages/checkout.php
@@ -1,6 +1,360 @@
 <?php 
 session_start();
 ?>
+
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <meta name="description" content="">
+    <meta name="author" content="Mark Otto, Jacob Thornton, and Bootstrap contributors">
+    <meta name="generator" content="Hugo 0.84.0">
+    <title>Checkout example · Bootstrap v5.0</title>
+
+    <link rel="canonical" href="https://getbootstrap.com/docs/5.0/examples/checkout/">
+
+    
+
+    <!-- Bootstrap core CSS -->
+<link href="/docs/5.0/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
+
+    <!-- Favicons -->
+<link rel="apple-touch-icon" href="/docs/5.0/assets/img/favicons/apple-touch-icon.png" sizes="180x180">
+<link rel="icon" href="/docs/5.0/assets/img/favicons/favicon-32x32.png" sizes="32x32" type="image/png">
+<link rel="icon" href="/docs/5.0/assets/img/favicons/favicon-16x16.png" sizes="16x16" type="image/png">
+<link rel="manifest" href="/docs/5.0/assets/img/favicons/manifest.json">
+<link rel="mask-icon" href="/docs/5.0/assets/img/favicons/safari-pinned-tab.svg" color="#7952b3">
+<link rel="icon" href="/docs/5.0/assets/img/favicons/favicon.ico">
+<meta name="theme-color" content="#7952b3">
+
+
+    <style>
+      .bd-placeholder-img {
+        font-size: 1.125rem;
+        text-anchor: middle;
+        -webkit-user-select: none;
+        -moz-user-select: none;
+        user-select: none;
+      }
+
+      @media (min-width: 768px) {
+        .bd-placeholder-img-lg {
+          font-size: 3.5rem;
+        }
+      }
+    </style>
+
+    
+    <!-- Custom styles for this template -->
+    <link href="form-validation.css" rel="stylesheet">
+  </head>
+  <body class="bg-light">
+    
+<div class="container">
+  <main>
+    <div class="py-5 text-center">
+      <img class="d-block mx-auto mb-4" src="/docs/5.0/assets/brand/bootstrap-logo.svg" alt="" width="72" height="57">
+      <h2>Checkout form</h2>
+      <p class="lead">Below is an example form built entirely with Bootstrap’s form controls. Each required form group has a validation state that can be triggered by attempting to submit the form without completing it.</p>
+    </div>
+
+    you have ordered:<br>
+<?php
+$text="";
+foreach($_SESSION["panier"] as $item){
+    $text .="- ".$item['quantity']." ".$item["itemName"]." which costs ";
+    if($item['quantity']>=16){
+        $text .= $item["price"]*$item["quantity"]*(1-0.16)." € (you have received a 16% discount !)<br>";
+    } else if($item['quantity']>=8){
+        $text .= $item["price"]*$item["quantity"]*(1-0.08)." € (you have received a 8% discount !)<br>";
+    } else {
+        $text .= $item["price"]*$item["quantity"]*(1)." €<br>";
+    }
+}
+echo $text;
+?>
+
+    <div class="row g-5">
+      <div class="col-md-5 col-lg-4 order-md-last">
+        <h4 class="d-flex justify-content-between align-items-center mb-3">
+          <span class="text-primary">Your cart</span>
+          <span class="badge bg-primary rounded-pill">3</span>
+        </h4>
+        <ul class="list-group mb-3">
+        <?php $totalprice = 0;
+        foreach($_SESSION['panier'] as $item){?>
+          <li class="list-group-item d-flex justify-content-between lh-sm">
+            <div>
+              <h6 class="my-0"><?php echo $item['itemName']?></h6>
+              <small class="text-muted"><?php echo 'Quantity: '.$item["quantity"].' item.'?></small>
+            </div>
+            <span class="text-muted"><?php if($item['quantity']>=16){
+                    echo $item["price"]*$item["quantity"]*(1-0.16)." € (16% discount)";
+                    $totalprice += $item["price"]*$item["quantity"]*(1-0.16);
+                } else if($item['quantity']>=8){
+                    echo $item["price"]*$item["quantity"]*(1-0.08)." € (8% discount)";
+                    $totalprice += $item["price"]*$item["quantity"]*(1-0.08);
+                } else {
+                    echo $item["price"]*$item["quantity"]." €";
+                    $totalprice += $item["price"]*$item["quantity"];
+                }?>
+            </span>
+          </li>
+          <?php }?>
+          <li class="list-group-item d-flex justify-content-between bg-light">
+            <div class="text-success">
+              <h6 class="my-0">Promo code</h6>
+              <small>EXAMPLECODE</small>
+            </div>
+            <span class="text-success"></span>
+          </li>
+          <li class="list-group-item d-flex justify-content-between">
+            <span>Total (EURO)</span>
+            <strong><?php echo $totalprice;?> €</strong>
+          </li>
+        </ul>
+
+        <form class="card p-2">
+          <div class="input-group">
+            <input type="text" class="form-control" placeholder="Promo code" id="promocode">
+            <button type="submit" class="btn btn-secondary">Redeem</button>
+          </div>
+        </form>
+      </div>
+      <div class="col-md-7 col-lg-8">
+        <h4 class="mb-3">Billing address</h4>
+        <form class="needs-validation" novalidate>
+          <div class="row g-3">
+            <div class="col-sm-6">
+              <label for="firstName" class="form-label">First name</label>
+              <input type="text" class="form-control" id="firstName" placeholder="" value="" required>
+              <div class="invalid-feedback">
+                Valid first name is required.
+              </div>
+            </div>
+
+            <div class="col-sm-6">
+              <label for="lastName" class="form-label">Last name</label>
+              <input type="text" class="form-control" id="lastName" placeholder="" value="" required>
+              <div class="invalid-feedback">
+                Valid last name is required.
+              </div>
+            </div>
+
+            <div class="col-12">
+              <label for="address" class="form-label">Address</label>
+              <input type="text" class="form-control" id="address" placeholder="1234 Main St" required>
+              <div class="invalid-feedback">
+                Please enter your shipping address.
+              </div>
+            </div>
+
+            <div class="col-12">
+              <label for="address2" class="form-label">Address 2 <span class="text-muted">(Optional)</span></label>
+              <input type="text" class="form-control" id="address2" placeholder="Apartment or suite">
+            </div>
+
+            <div class="col-md-5">
+              <label for="country" class="form-label">Country</label>
+              <select class="form-select" id="country" required>
+                <option value="">Choose...</option>
+                <option>United States</option>
+              </select>
+              <div class="invalid-feedback">
+                Please select a valid country.
+              </div>
+            </div>
+
+            <div class="col-md-4">
+              <label for="state" class="form-label">State</label>
+              <select class="form-select" id="state" required>
+                <option value="">Choose...</option>
+                <option>California</option>
+              </select>
+              <div class="invalid-feedback">
+                Please provide a valid state.
+              </div>
+            </div>
+
+            <div class="col-md-3">
+              <label for="zip" class="form-label">Zip</label>
+              <input type="text" class="form-control" id="zip" placeholder="" required>
+              <div class="invalid-feedback">
+                Zip code required.
+              </div>
+            </div>
+          </div>
+
+          <h4 class="mb-3">Shipping Method</h4>
+
+          <div class="my-3">
+            <div class="form-check">
+              <input id="DHL Express" name="paymentMethod" type="radio" class="form-check-input" required>
+              <label class="form-check-label" for="DHL Express">DHL Express (+44 €)</label>
+            </div>
+            <div class="form-check">
+              <input id="DHL" name="paymentMethod" type="radio" class="form-check-input" required>
+              <label class="form-check-label" for="DHL">DHL</label>
+            </div>
+            <div class="form-check">
+              <input id="DPD" name="paymentMethod" type="radio" class="form-check-input" required>
+              <label class="form-check-label" for="DPD">DPD (-19 €)</label>
+            </div>
+          </div>
+
+          <hr class="my-4">
+
+          <div class="form-check">
+            <input type="checkbox" class="form-check-input" id="same-address" required>
+            <label class="form-check-label" for="same-address">By using this website you are agreeing to our Privacy Policy and our Data Protection Policy</label>
+            </div>
+
+          <hr class="my-4">
+
+          <h4 class="mb-3">Payment</h4>
+
+          <div class="my-3">
+            <div class="form-check">
+              <input id="credit" name="paymentMethod" type="radio" class="form-check-input" checked required>
+              <label class="form-check-label" for="credit">Credit card</label>
+            </div>
+            <div class="form-check">
+              <input id="debit" name="paymentMethod" type="radio" class="form-check-input" required>
+              <label class="form-check-label" for="debit">Debit card</label>
+            </div>
+            <div class="form-check">
+              <input id="paypal" name="paymentMethod" type="radio" class="form-check-input" required>
+              <label class="form-check-label" for="paypal">PayPal</label>
+            </div>
+          </div>
+
+          <div class="row gy-3">
+            <div class="col-md-6">
+              <label for="cc-name" class="form-label">Name on card</label>
+              <input type="text" class="form-control" id="cc-name" placeholder="" required>
+              <small class="text-muted">Full name as displayed on card</small>
+              <div class="invalid-feedback">
+                Name on card is required
+              </div>
+            </div>
+
+            <div class="col-md-6">
+              <label for="cc-number" class="form-label">Credit card number</label>
+              <input type="text" class="form-control" id="cc-number" placeholder="" required>
+              <div class="invalid-feedback">
+                Credit card number is required
+              </div>
+            </div>
+
+            <div class="col-md-3">
+              <label for="cc-expiration" class="form-label">Expiration</label>
+              <input type="text" class="form-control" id="cc-expiration" placeholder="" required>
+              <div class="invalid-feedback">
+                Expiration date required
+              </div>
+            </div>
+
+            <div class="col-md-3">
+              <label for="cc-cvv" class="form-label">CVV</label>
+              <input type="text" class="form-control" id="cc-cvv" placeholder="" required>
+              <div class="invalid-feedback">
+                Security code required
+              </div>
+            </div>
+          </div>
+
+          <hr class="my-4">
+
+          <button class="w-100 btn btn-primary btn-lg" type="submit">Continue to checkout</button>
+        </form>
+      </div>
+    </div>
+  </main>
+
+  <footer class="my-5 pt-5 text-muted text-center text-small">
+    <p class="mb-1">&copy; 2017–2021 Company Name</p>
+    <ul class="list-inline">
+      <li class="list-inline-item"><a href="#">Privacy</a></li>
+      <li class="list-inline-item"><a href="#">Terms</a></li>
+      <li class="list-inline-item"><a href="#">Support</a></li>
+    </ul>
+  </footer>
+</div>
+
+
+<script src="https://cdn.startbootstrap.com/sb-forms-latest.js"></script>
+        <script src="js/slideBox.js"></script>
+      <script src="form-validation.js"></script>
+  </body>
+</html>
+
+<!-- Add this script to the end of your HTML file, before the closing </body> tag -->
+<script src="https://code.jquery.com/jquery-3.6.4.min.js"></script>
+<script>
+  $(document).ready(function() {
+    // Function to update total price based on shipment method
+    function updateTotalPrice() {
+      // Get the selected shipment method
+      var selectedMethod = $("input[name='paymentMethod']:checked").attr("id");
+
+      // Récupérer le code promo saisi par l'utilisateur
+      var promoCode = $("#promocode").val();
+
+      // Get the current total price
+      var totalPrice = <?php echo $totalprice; ?>;
+
+      // Update total price based on the selected method
+      switch (selectedMethod) {
+        case "DHL Express":
+          totalPrice += 44; // Add 44 to the total
+          break;
+        case "DPD":
+          totalPrice -= 19; // Subtract 19 from the total
+          break;
+        // Add more cases for other shipment methods if needed
+
+        default:
+          break;
+      }
+      
+      // Faire une requête AJAX pour obtenir la remise associée au code promo
+      $.ajax({
+        url: '../html/data_treatment/AJAX/check_coupon.php', // Remplacez 'get_discount.php' par le chemin réel de votre script serveur
+        type: 'POST',
+        data: { promoCode: promoCode },
+        success: function(response) {
+          // Mettre à jour le prix total avec la remise obtenue
+          var discount = parseFloat(response);
+          console.log(response);
+          totalPrice = totalPrice - (totalPrice * discount); // Appliquer la remise
+          console.log(totalPrice);
+          // Update the displayed total price
+          $("strong").text(totalPrice.toFixed(2) + " €");
+        },
+        error: function() {
+          // En cas d'erreur, ne rien faire ou afficher un message d'erreur
+        }
+      });
+    }
+
+    // Attacher l'événement de changement à l'input du code promo
+    $("#promocode").on('input', function() {
+      updateTotalPrice();
+    });
+
+    // Attach change event to shipment method radio buttons
+    $("input[name='paymentMethod']").change(function() {
+      updateTotalPrice();
+    });
+
+    // Initial update when the page loads
+    updateTotalPrice();
+  });
+</script>
+
+
+
 you have ordered:<br>
 <?php
 $text="";