Add subscribers to EmailOctopus via your WordPress Contact Form

functions.php

<?php
// add this code to your child theme
add_action('fwsacf_after_success_form', 'fw_add_newsletter_contact_form');
function fw_add_newsletter_contact_form($form_obj) {
	if (!class_exists('FWEO_EmailOctopus_integration')) return; 
	$data = array('FirstName' => $form_obj['name']);
	if (!empty($form_obj['accept_terms'])) {
		$data['tags'] = 'newsletter';
	}
	$list = get_option('fweo_emailoctopus_list_id');
	$eo = new FWEO_EmailOctopus_integration();
	$eo->add_subscriber($form_obj['email'], $list, $data);
}

Use this action hook together with our contact form plugin and the plugin for EmailOctopus.
https://wordpress.org/plugins/fws-ajax-contact-form/
https://wordpress.org/plugins/fw-integration-for-emailoctopus/
Find more information on our website.