How to add a delete button to a PHP form that will delete a row from a MySQL table

It is essential to pass a variable in the delete link. You can either pass the variable (?php echo $contact['name']; ?) in a hidden field or pass it in the URL.

Step 1
Replace the original code:

        <td class="contact-delete">
                <form action='delete.php' method="post">
                        <input type="hidden" name="name" value="">
                        <input type="submit" name="submit" value="Delete">
                </form>
        </td>

Step 2
With the following code:

        <td class="contact-delete">
                <form action='delete.php?name="<?php echo $contact['name']; ?>"' method="post">
                        <input type="hidden" name="name" value="<?php echo $contact['name']; ?>">
                        <input type="submit" name="submit" value="Delete">
                </form>
        </td>