Delete data from database using php and sql - php

Question

So I have a php page that looks like this
<?php
echo "<table border='1' width= 300px >
<tr>
<th>Friend Names</th>
<th>Remove Friends</th>
</tr>";
while($row = mysqli_fetch_assoc($result2))
{
$friend_id_got = $row['friend_id2'];
$query3 = "SELECT profile_name
from friends
where friend_id = '$friend_id_got' ";
$result3 = $conn->query($query3);
$final3 = mysqli_fetch_assoc($result3);
echo "<tr>";
echo "<td>" . $final3['profile_name'] . "</td>";
echo "<td>"
?>
<form action="friendlist.php" method= "POST">
<button id="add-friend-btn" type= 'submit' name = 'submit'>Unfriend</button>
</form>
<?php
"</td>";
echo "</tr>";
}
echo "</table>";
When I press the button, I need the corresponding name to delete it. The only problem I'm facing is that How do I get the name corresponding to the button.
I think we need to relate the buttons and the name somehow, so when a specific button is pressed i get the corresponding name

Answer 1

From the question and comments, and a glance at your code it sounds like you probably actually need two pieces of data to be submitted to the server when your button is clicked:
The action which should be undertaken in response to the request (i.e. unfriending)
The ID of the person being unfriended
To achieve that you can add some hidden fields to your form. These are invisible to the user but will be available to PHP in the $_POST data when the form is submitted.
Something like this:
<form action="friendlist.php" method= "POST">
<input type="hidden" name="unfriend_id" value="<?=$friend_id_got ?>" />
<input type="hidden" name="action" value="unfriend" />
<button id="add-friend-btn" type="submit" name= "submit">Unfriend</button>
</form>

Answer 2

Following on from the comment from #ADyson:
<form action="friendlist.php" method= "POST">
<input type="hidden" name="cancel_id" value="<?=$friend_id_got ?>" />
<button id="add-friend-btn" type="submit" name="submit">Unfriend</button>
</form>
By including a hidden field in the form, you're able to store more information.
You can see that I'm storing the ID of the friend you're unfriending in the value of the hidden field, so when the form is submitted (the button is clicked) you'll have access to "cancel_id" in the POST data, which will obviously contain the ID of the friend to unfriend.