html输入类型选择中的错误php foreach

Question

I have a problem, I have an array of contacts that I send from the controller to the view and when it comes to going through it with a pos loop, everything goes well, but the problem lies when I try to interact within a select type input, creating for each contact a <option> iterates but does not access the values

 <select id="members" name="members[]" class="form-select" multiple required>
    <option value="tu" selected>Tú</option>
    <?php foreach ($contacts as $contact) : ?>
        <option value="<?php echo $contact[$id] ?>"><?php echo $contact[$username] ?></option>
    <?php endforeach; ?>

</select>

this does work but outside the input select -->

<?php foreach ($contacts as $contact) : ?>
    <?php debug($contact); //function for print data
    ?>
<?php endforeach; ?>

this is what the date looks like -->

Answer 1

There are 3 different method to get value.

1. using key name with "square brackets []":

    <select id="members" name="members[]" class="form-select" multiple required> <option value="tu" selected>Tú</option> <?php foreach ($contacts as $contact) : ?> <option value="<?php echo $contact['id'] ?>"><?php echo $contact['username'] ?></option> <?php endforeach; ?> </select>

2. using key name with "arrow ->":

    <select id="members" name="members[]" class="form-select" multiple required> <option value="tu" selected>Tú</option> <?php foreach ($contacts as $contact) : ?> <option value="<?php echo $contact->id ?>"><?php echo $contact->username ?></option> <?php endforeach; ?> </select>

3. using key name with "dots . ":

    <select id="members" name="members[]" class="form-select" multiple required> <option value="tu" selected>Tú</option> <?php foreach ($contacts as $contact) : ?> <option value="<?php echo $contact.id ?>"><?php echo $contact.username ?></option> <?php endforeach; ?> </select>

Those all methods are same but we can get value using this methods simple.