Supply a foreach to ACF Select Field

• Semirxbih

• March 10, 2020 at 7:11 am

So I have the form bit of a WP Core Widgets class that I am working on and I’m stuck on wanting to supply a list that’s already populated to a Advanced Custom Field ‘select’ field.

Instead of lists, how can I supply and save the drop-down results to acf_lists?

    // This is the backend of the widgets
    public function form($instance)
    {
    
        // Grab the widget ID
        $widget_id = $this->id;
    
        $acf_lists = get_field('mailchimp_list', $widget_id) ? get_field('mailchimp_list',$widget_id) : '';
        var_dump($acf_lists);
    
        // Grab the MailChimp_API getters and setters
        $api = mailchimpSF_get_api();
    
        // If there is no API, return
        if (!$api) {
            return;
        }
    
        // If there is an API Key, proceed
        if ($api) {
    
            $lists = $api->get(
                'lists',
                100,
                [
                    'fields' => 'lists.id,lists.name,lists.email_type_option'
                ]
            );
            $lists = $lists['lists'];
    
            // If there are no lists present
            if (count($lists) == 0) {
                ?>
                <span class='error_msg'>
                <?php
                echo sprintf(
                    esc_html("Uh-oh, you don't have any lists defined! Please visit %s, login, and setup a list before using this tool!"),
                    "<a href='http://www.mailchimp.com/'>MailChimp</a>"
                );
                ?>
            </span>
                <?php
            } else {
                ?>
                <table class="mc-list-select">
                    <tr class="mc-list-row">
                        <td>
                            <select name="mc_list_id">
                                <option value=""> &mdash; <?= 'Select A List' ?>
                                    &mdash;
                                </option>
                                <?php
                                foreach ($lists as $list) {
                                    $option = get_option('mc_list_id');
                                    ?>
                                    <option value="<?= $list['id'] ?>"<?= selected($list['id'],
                                        $option); ?>><?= $list['name'] ?></option>
                                    <?php
                                }
                                ?>
                            </select>
                        </td>
                        <td>
                            <input type="hidden" name="mcsf_action"
                                   value="update_mc_list_id"/>
                            <input type="submit" name="Submit"
                                   value="<?= 'Update List' ?>" class="button"/>
                        </td>
                    </tr>
                </table>
                <?php
            }
        }
    }

Here is what the widget looks like:

[![enter image description here][1]][1]

How can I supply the current foreach that I have into the $acf_lists variable? I’m able to loop through and supply it to a standard drop-down but I’m unsure how I can supply it to the ACF dropdown.

This is my ACF Mailchimp list select field:

[![enter image description here][2]][2]

[1]: https://i.stack.imgur.com/M7FNX.png
[2]: https://i.stack.imgur.com/0Xukh.png