แนะนำเกี่ยวกับการเเสดงรายละเอียดสินค้า เฉพาะสินค้าที่เลือกหน่อยครับ

 if (!empty($cate_id)) {  // เป็นค่าไม่ว่าง หรือไม่ NULL หรือไม่ 0
$cate_id = (isset($_GET['cate_id'])) ? (int) ($_GET['cate_id']) : NULL;                                   
$sqli = "SELECT * FROM product  where cate_id='$cate_id'  ";
}else{
$sqli = "SELECT * FROM product ";
}
$Query = mysqli_query($con, $sqli);

<?php 
$cate_id = (isset($_GET['cate_id'])) ? (int) ($_GET['cate_id']) : NULL;   

if(issset($cate_id)){
$sqli = "SELECT * FROM product  where cate_id='$cate_id'  ";
}else{
$sqli = "SELECT * FROM product ";
}
$Query = mysqli_query($con, $sqli);
?>

<?php
                  $sqli = "SELECT * FROM product ";
                  $cate_id = (isset($_GET['cate_id'])) ? (int) ($_GET['cate_id']) : NULL;
                  if (!empty($cate_id)) {  // เป็นค่าไม่ว่าง หรือไม่ NULL หรือไม่ 0
                      $sqli .= " where cate_id='$cate_id' ";
                  }
                  $Query = mysqli_query($con, $sqli);
                  while ($product = mysqli_fetch_assoc($Query)) {
                      $_cate_id = $product['cate_id'];
                      $_pro_id = $product['pro_id'];
                      $url_delete = "Delete_Product.php?cate_id=$_cate_id&pro_id=$_pro_id";
                      ?>
                      <tbody align="center">
                          <tr>
                              <td><?php echo $product['pro_id']; ?></td>
                              <td><a href="Show_Product.php?pro_id=<?php echo $product['pro_id']; ?>"><?php echo $product['pro_name']; ?></a></td>
                              <td><img src="image/<?php echo $product['pro_image']; ?>"width="50px" height="50px"></td>
                              <td><button type="button" class="btn btn-outline-danger"><a href="Edit_Product.php?pro_id=<?php echo $product['pro_id']; ?>">แก้ไข</a></td></button>
                              <td><a href="<?= $url_delete ?>" onClick="return confirm('ยืนยันการลบข้อมูล');">ลบ</a></td>
                          </tr>

<?php
$pro_id = $_GET['pro_id'];
                        $sqli = "SELECT * FROM product WHERE pro_id = '$pro_id'  ";
                        $Query = mysqli_query($con, $sqli);
                        while ($product = mysqli_fetch_assoc($Query)) {
                            ?>
                            <tbody align="center">
                                <tr>
                                    <td><?php echo $product['pro_id']; ?></td>
                                    <td><?php echo $product['pro_name']; ?></td>
                                    <td><img src="image/<?php echo $product['pro_image']; ?>"width="50px" height="50px"></td>
                                    <td></td>
                                    <td><button type="button" class="btn btn-outline-danger"><a href=".php?pro_id=<?php echo $product['pro_id']; ?>">แก้ไข</a></td></button>
                                    <td><a href="JavaScript:if(confirm('Confirm Delete?')==true){window.location='.php?cate_id&&pro_id=<?php echo $product['pro_id']; ?>';}">ลบ</a></td>
                                </tr>