Add a user to the MailerLite email provider. This currently only adds, using the PHP SDK had issues when running in an older version of PHP.

mailerlite-subscribe.php

function add_subscriber_to_mailerlite($email, $name) {
    $apiKey = 'YOUR_MAILERLITE_API_KEY'; // Replace with your MailerLite API Key
    $groupId = 'YOUR_GROUP_ID'; // Replace with your MailerLite Group ID if necessary

    $url = 'https://api.mailerlite.com/api/v2/subscribers';

    $data = array(
        'email' => $email,
        'name' => $name,
        'groups' => array($groupId)
    );

    $options = array(
        'http' => array(
            'header'  => "Content-type: application/json\r\nX-MailerLite-ApiKey: $apiKey\r\n",
            'method'  => 'POST',
            'content' => json_encode($data),
        ),
    );

    $context  = stream_context_create($options);
    $result = file_get_contents($url, false, $context);

    if ($result === FALSE) { /* Handle error */ }

    return $result;
}