<?php

// Place this code into the functions.php file or your WordPress child theme

add_action('wpcf7_mail_sent', 'fw_wpcf7_subscribe_to_eo4wp' ); 
function fw_wpcf7_subscribe_to_eo4wp( $contact_form ){
    // get form id
    $form_id = $contact_form->id();
    // get submission data
    $submission = WPCF7_Submission::get_instance(); 
    $posted_data = $submission->get_posted_data();
    if (!empty($posted_data['newsletter'])) {
		$tag = 'newsletter';
		$data = array('tags' => $tag, 'FirstName' => $posted_data['your-name']);
		$list = get_option('fweo_emailoctopus_list_id');
		$eo = new FWEO_EmailOctopus_integration();
		$eo->add_subscriber($posted_data['your-email'], $list, $data);
	}
}