У меня есть проблема с POST в PHP

Question

Эй им еще новичок в PHP, и им делают модель детали, и я хочу, чтобы получить идентификатор из POST, но я получаю эту проблему Примечание: Undefined индекс: идентификатор в E: \ XAMPP \ HTDOCS \ Site \ включает \ detailmodal.php в строке 3

это функция:

 <script> 
    function details(id) 
    { 
    var data = { "id" : id }; 
    jQuery.ajax({ 
    url : <?= BASEURL; ?>+'includes/detailmodal.php', 
    method : 'POST', 
    data : data, 
    success : function(data){ 
     $('body').append(data); 
     $('#details-modal').modal('toggle'); 
     }, 
     error : function(){ 
     alert("something went wrong") 
     } 
    }); 
    } 
    </script> 
    <script src="js/jquery-3.1.0.min.js" type="text/javascript"></script> 
    <script src="js/bootstrap.js" type="text/javascript"></script> 
    </body> 
    </html> 

это index.php:

<?php include_once 'core/init.php' ?> 
    <?php include 'includes/head.php' ?> 
    <?php include 'includes/navigation.php' ?> 
    <?php include 'includes/header.php' ?> 
    <?php include 'includes/detailmodal.php' ?> 
    <?php include 'includes/footer.php' ?> 
    <?php 
    $sql='SELECT * FROM products'; 
    $featured=$db->query($sql); 
    ?> 
    <!-- Body --> 

    <!-- Products --> 
    <div class="container-fluid"> 
     <div class="col-md-2"> 
     left side 
     </div> 
    <div class="col-md-8"> 
    <div class="row"> 
     <h1 class="text-center" style="color:blue; font-family: 'Orbitron', sans-    serif; font-size:24px;">Products</h1><br> 
    <?php while ($products = mysqli_fetch_assoc($featured)): ?> 
     <div class="col-md-3"> 
     <h1 class="text-center" style="color:blue; font-family: 'Orbitron', sans-serif; font-size:16px;"><?= $products["title"]?></h1> 
     <center> <img src="<?= $products["image"]?>" class="image-thumb" alt="Procuct1"/></center> 
     <p class="list-price text-danger text-center">List Price : <s><?= $products["list_price"]?></s> </p> 
     <p class="price text-center">Our Price : <?= $products["price"]?> </p> 
     <center> <button type="button" class="btn btn-sm btn-success" name="submit" onclick="details(<?php echo $products['id'];?>)">Details</button>  </center> 
    </div> 
    <?php endwhile;?> 
    </div> 
    </div> 
    <div class="col-md-2"> 
    right side 
    </div> 
</div> 
<!-- Modal --> 

это detailmodal.php:

<?php 
require_once $_SERVER['DOCUMENT_ROOT'].'/site/core/init.php'; 
    $id = $_POST["id"]; 
    $id = (int)$id; 
$sql = "SELECT * FROM products WHERE id = '$id'"; 
$result = $db->query($sql); 
$products = mysqli_fetch_assoc($result); 
?> 
<?php ob_start(); ?> 
<div class="modal fade details-1" id="details-modal" tabindex="-1" role="dialog" aria-labelledby="details-1" aria-hidden="true"> 
    <div class="modal-dialog modal-lg"> 
    <div class="modal-content"> 
    <div class="modal-header"> 
     <button type="button" class="close" name="button" data-dismiss="modal" aria-label="Close"> 
     <span aria-hidden="true">&times;</span> 
     </button> 
     <h4 class="modal-title text-center" style="color:blue; font-family: 'Orbitron', sans-serif; font-size:40px;"><?php echo $products['title']; ?></h4> 
     <div class="modal-body"> 
     <div class="container-fluid"> 
      <div class="row"> 
      <div class="col-sm-6"> 
       <div class="center-block"> 
       <img src="<?php echo $products['image'];?>" alt="product1" class="details img-responsive"/> 
       </div> 
      </div> 
      <div class="col-sm-6"> 
       <div class="center-block"> 
       <h4 class="text-center" style="color:White; font-family: 'Orbitron', sans-serif; font-size:25px;">Details</h4><br><br> 
       <p style="color:black; font-family: 'Orbitron', sans-serif; font-size:25px;"> 
         <?php echo $products['description'];?> 
       </p> 
       <form action="add-to-cart.php" method="post"> 
        <div class="form-group"> 
        <div class="col-xs-3"> 
        <label id="quantitylbl" for="quantity">Quantity</label> 
         <input type="text" name="quantity" class="form-control" id="quantity" value="1" required> 
        </div> 
        <br> 
        <p> 
         available : 3 
        </div> 

        <div class="form-group"> 

         <label id="sizelbl" for="size">Size</label> 
         <select name="size" id="size" class="form-control"> 
         <option value="20">20</option> 
         <option value="22">22</option> 
         <option value="25">25</option> 
         </select> 
         </div> 


       </form> 
       </div> 
      </div> 
      </div> 
     </div> 
     </div> 
     <div class="modal-footer"> 
     <button type="button" class="btn btn-default" data-dismiss="modal" name="button">Close</button> 
     <button type="submit" class="btn btn-warning" name="button"><span class="glyphicon glyphicon-shopping-cart"></span>Add to Cart</button> 
     </div> 
    </div> 
    </div> 
</div> 
</div> 
<?php echo ob_get_clean(); ?> 

Answer 1

в Ajax запроса измените строку

method : "GET" 

в

method : "POST" 

Также в файле PHP добавить эту строку после того, как требуется

if($_SERVER['REQUEST_METHOD'] == 'POST'){ 

и закрыть его конец кода

Answer 2

Изменить метод в JQuery для POST

JQuery.ajax({ 
[...] 
method: 'POST' 
[...]