php怎么实现点击按钮删除一条数据

$host = "localhost"; //主机名
$username = "root"; //用户名
$passWord = ""; //密码
$dbname = "mydatabase"; //数据库名称

$conn = mysqli_connect($host, $username, $password, $dbname) or die("连接失败:" . mysqli_connect_error());

if(isset($_POST['delete_id'])) {
    $id = $_POST['delete_id'];
 
    $sql = "DELETE FROM mytable WHERE id = '$id'";
 
    if(mysqli_query($conn, $sql)) {
        echo "该数据已成功删除。";
    } else {
        echo "删除数据时发生错误。" . mysqli_error($conn);
    }
}

<table>
    <thead>
        <tr>
            <th>ID</th>
            <th>名称</th>
            <th>描述</th>
            <th> </th>
        </tr>
    </thead>
    <tbody>
        <?php
            //查询数据表中的所有数据
            $query = "SELECT * from mytable";
            $result = mysqli_query($conn, $query);
 
            while($row = mysqli_fetch_assoc($result)) {
                $id = $row['id'];
                $name = $row['name'];
                $description = $row['description'];
 
                echo "<tr>";
                echo "<td>$id</td>";
                echo "<td>$name</td>";
                echo "<td>$description</td>";
                echo "<td><fORM method='POST' action='delete.php'><input type='hidden' name='delete_id' value='$id'><input type='submit' value='删除'></form></td>";
                echo "</tr>";
            }
        ?>
    </tbody>
</table>