delete query in php mysql || How to delete data from database in PHP using button delete

<?Php $servername = "localhost";
$username = "u336260023_user";
$password = "mypassword";
$dbname = "u336260023_user";

$conn = mysqli_connect($servername,$username,$password,$dbname);

$ID = "2"

$query = mysqli_query($conn,"DELETE FROM `dldata` WHERE `dldata`.`id` = $ID;
") ;

if($query ==TRUE){
    echo '<script type="text/javascript">
                                        alert("Delete Successfully");
            window.location.href = "dlcardlist.php"
        </script>';
}else{
                                        echo '<script type="text/javascript">
                                        alert("Something went wrong Please try again");
            window.location.href = "dlcardlist.php"
        </script>';
                                    }
?>