<?php //first:connect to db include "conn.php"; //second? $oid = $_GET['id']; //create sql $sql="DELETE FROM online_ordering WHERE Order_ID= $oid"; mysqli_query($conn, $sql); //if unsuccessfully deleted...then if(mysqli_affected_rows($conn)<=0) { echo "<script>alert('Unable to delete data!');"; die ("window.location.href='my_purchases.php';</script>"); } //successfully deleted then... echo "<script>alert('Your order has been cancelled!');</script>"; echo "<script>window.location.href='my_purchases.php';</script>"; $sql1 = "DELETE FROM online_payment WHERE Payment_ID = '$oid'"; $result1 = mysqli_query($conn, $sql1); ?>