could not update mysqli command

Hi
I have another issue in Update. Could not be updated. pls help me

if (isset($_POST['update']) && $_POST['update']  != "" )
    
    {
        $id=$_POST["id"];
        $name = $_POST["name"];
        $address = $_POST["address"];
        $tel = $_POST["tel"];
        $fax = $_POST["fax"];
        $email = $_POST["email"];
        $website = $_POST["website"];
        $type = $_POST["type"];    
    
 
        try 
            {
            $sql="UPDATE bk_customer SET name='$name',address='$address', tel='$tel',fax='$fax',email='$email', website='$website',type='$type' WHERE id='$id'";
                    $result = mysqli_query($con,$sql) ; 
//                    $result=mysqli_fetch_assoc($con,$sql);
            
            } 
        catch (Exception $ex) 
            {
              echo $e->getMessage() . "\n";
              file_put_contents('PDOErrors.txt', $e->getMessage(), FILE_APPEND);
              exit();                   
            }
    
    }