สอบถามค่ะ จะทำปุ่ม Delete ให้ลบรายชื่อได้บนหน้าเพจ

<?php
$con= mysqli_connect("localhost","root"," ","name") or die("Error: " . mysqli_error($con));

mysqli_query($con, "SET NAMES 'utf8' ");

$sort_option = "ASC";

$query = "SELECT * FROM detail ORDER BY firstname $sort_option";
$query_run = mysqli_query($con, $query);

?>

<?php
	ini_set('display_errors', 1);
	error_reporting(~0);

	$serverName = "localhost";
	$userName = "root";
	$userPassword = "";
	$dbName = "name";

    $message2 = ". . ลบรายชื่อเรียบร้อย . .";
	$conn = mysqli_connect($serverName,$userName,$userPassword,$dbName);

    $query = "SELECT * FROM detail";  
    $success = mysqli_query($conn,$query); 

    if (isset($_GET['id'])) {  
        $id = $_GET['id'];  
        $query = "DELETE FROM `detail` WHERE id = '$id'";  
        $run = mysqli_query($conn,$query);  
        if ($success) {  
            echo "<script type='text/javascript'>alert('$message2');</script>";
            echo "<script>";
            echo "location=Showlist.php'";
            echo "</script>";
        }else{  
             echo "Error: ".mysqli_error($conn);  
        }  
    }

	mysqli_close($conn);
?>

<?php include "conn.php"; 
      include "delete.php";  
      $i=1;
      if(mysqli_num_rows($query_run) > 0)
      {
           foreach($query_run as $row)
           {
           ?>
              <tr class='data'>  
                <td><?= $i++ ?></td>
                <td><?= $row['firstname']; ?></td>
                <td><?= $row['lastname']; ?></td>
                <td><?= $row['savedate']; ?></td>
                <td><a href='delete.php?id="$result['id']."' id='btn'>Delete</a></td>  
                </tr>
             <?php
            }
             }
             else
             {
                ?>
                    <tr>
                        <td colspan="3"> . . หาข้อมูลไม่พบ . .</td>
                    </tr>
                <?php
             }