<?php require "connectionDb.php"; if (isset($_POST['delete']) && !empty($_POST['deleteid']) ){ $id = $_POST['deleteid']; $del = "DELETE FROM customer WHERE id='$id'"; $db->exec($del); echo '<script>window.location.href="customers.php"</script>'; } ?> <style type="text/css"> .deleteForm { display: none; } </style> <div class="container deleteForm" id="deleteForm"> <form action="" method="post"> <input type="number" name="deleteid" id="deleteid"> <input type="submit" name="delete" value="OK" class="btn btn-danger"> </form> </div>