Bootstrap modal doesn't get user ID - php

Question

I have a problem with a bootstrap modal. I'm using PHP.
In an admin panel there is a table with the list of the users and the possibility to edit or delete a user's profile. For the delete I want to create a modal for the confirm of the delete but, when I click on "confirm" button inside the modal, the modal gets by default the user ID of the first user in the table and not the user ID of the selected user.
Here is the code:
<?php foreach ($utenti as $utente) { ?>
<tr>
<th scope="row"> <?php echo $utente['idUser']?> </th>
<td><?php echo $utente['nome']." ".$utente['cognome']?></td>
<?php if($_SESSION['role'] == 1) {?>
<td><?php echo $utente['az']?></td>
<?php } ?>
<td><?php echo $utente['email']?></td>
<td class="text-warning"><a
href="<?php echo 'editUser.php?user='.$utente['idUser']?>"><i
class="fas fa-edit text-warning"></i></a></td>
<!-- <td class="text-warning"><i class="fas fa-trash-alt text-danger"></i></td> -->
<td class="text-danger">
<button type="button" class="btn" data-toggle="modal"
data-target="#confirmDelete"><i
class="fas fa-trash-alt text-danger"></i><?php var_dump($utente['idUser']); ?>
</button>
</td>
<div class="modal" tabindex="-1" role="dialog" id="confirmDelete">
<div class="modal-dialog" role="document">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title">
Attenzione <?php var_dump($utente['idUser']); ?></h5>
<button type="button" class="close" data-dismiss="modal"
aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
<div class="modal-body">
<p>Continuando eliminerai l'utente in maniera irreversibile</p>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-danger "
><a
class="text-white btn-modal-confirm"
href="<?php echo '?action=delete&user='.$utente['idUser']?>"
>Elimina</a>
</button>
<button type="button" class="btn btn-secondary" data-dismiss="modal">
Indietro
</button>
</div>
</div>
</div>
</div>
</tr>
<?php }?>
If I make a var_dump of $utente['idUser'] before the modal, it gets the right user ID. If I make it inside the modal it gets by default the first ID, as I said.

Answer 1

Notice that every modal trigger button has a data-target attribute to define which modal will be opened.
In your case, the button of every row you used to triggered the modal have the same data-target, which is #confirmDelete. These modals behind also has the same id called #confirmDelete, so every time you hit the modal trigger button (all had the same data-target) then eventually it will shows up the very first modal element.
For a better understanding, compare my code to yours and see the differences.
<?php foreach ($utenti as $utente) { ?>
<tr>
<th scope="row"> <?php echo $utente['idUser']?> </th>
<td><?php echo $utente['nome']." ".$utente['cognome']?></td>
<?php if($_SESSION['role'] == 1) {?>
<td><?php echo $utente['az']?></td>
<?php } ?>
<td><?php echo $utente['email']?></td>
<td class="text-warning"><a
href="<?php echo 'editUser.php?user='.$utente['idUser']?>"><i
class="fas fa-edit text-warning"></i></a></td>
<!-- <td class="text-warning"><i class="fas fa-trash-alt text-danger"></i></td> -->
<td class="text-danger">
<button type="button" class="btn" data-toggle="modal"
data-target="#confirmDelete_<?php echo $utente['idUser']; ?>"><i
class="fas fa-trash-alt text-danger"></i><?php var_dump($utente['idUser']); ?>
</button>
</td>
<div class="modal" tabindex="-1" role="dialog" id="confirmDelete_<?php echo $utente['idUser']; ?>">
<div class="modal-dialog" role="document">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title">
Attenzione <?php echo $utente['idUser']; ?></h5>
<button type="button" class="close" data-dismiss="modal"
aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
<div class="modal-body">
<p>Continuando eliminerai l'utente in maniera irreversibile</p>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-danger "
><a
class="text-white btn-modal-confirm"
href="<?php echo '?action=delete&user='.$utente['idUser']?>"
>Elimina</a>
</button>
<button type="button" class="btn btn-secondary" data-dismiss="modal">
Indietro
</button>
</div>
</div>
</div>
</div>
</tr>
<?php }?>
In the above code, I gave every pair of modal elements (modal trigger button and modal ID) a unique data-target value and a unique element id.
...
<button type="button" class="btn" data-toggle="modal"
data-target="#confirmDelete_<?php echo $utente['idUser']; ?>">
...
<div class="modal" tabindex="-1" role="dialog" id="confirmDelete_<?php echo $utente['idUser']; ?>">
...
Now each pair of modal elements have their own ids and they should be working the way you wanted.