This class handles adding new users our MailChimp mailing list as well as updating the list entry based on actions

MailingList.php

<?php namespace Endata\Lists;

use MailChimp;
use Carbon\Carbon;

class MailingList {

    protected $mailchimp;

    protected $list_id = 'MCIDXXX'; // The MailChimp list id


    /*
     * Constructor initializes MailChimp API using the unique API key
     */
    public function __construct()
    {
        $this->mailchimp = new \Mailchimp('MCAPIKEY');
    }


    /**
     * Subscribe a user to a Mailchimp list
     * 
     * @param  [type] $email   [description]
     * @param  [type] $fname   [description]
     * @param  [type] $lname   [description]
     * @param  [type] $country [description]
     * @param  [type] $company [description]
     * @param  [type] $type    [description]
     * @param  [type] $phone   [description]
     * @return [type]          [description]
     */
    public function subscribe($email, $fname, $lname, $country, $company, $type, $phone)
    {
        $vars = array
        (
            'FNAME'         => $fname, 
            'LNAME'         => $lname,
            'COUNTRY'       => $country, 
            'COMPANY'       => $company, 
            'TYPE'          => $type, 
            'PHONE'         => $phone, 
            'SIGNED'        => Carbon::now('GMT')->toDateString()
        );

        return $this->send($email, $vars);
    }


    /**
     * [free_start description]
     * @param  [type] $email [description]
     * @return [type]        [description]
     */
    public function free_start($email)
    {
        $vars = array
        (
            'FREE_START'    => Carbon::now('GMT')->toDateString()
        );

        return $this->send($email, $vars);
    }    


    /**
     * [solo_start description]
     * @param  [type] $email [description]
     * @return [type]        [description]
     */
    public function solo_start($email)
    {
        $vars = array
        (
            'SOLO_START'    => Carbon::now('GMT')->toDateString()
        );

        return $this->send($email, $vars);
    }    


    /**
     * [solo_trial description]
     * @param  [type] $email [description]
     * @return [type]        [description]
     */
    public function solo_trial($email)
    {
        $vars = array
        (
            'SOLO_TRIAL'    => Carbon::now('GMT')->toDateString()
        );

        return $this->send($email, $vars);
    }    


    /**
     * [team_start description]
     * @param  [type] $email [description]
     * @return [type]        [description]
     */
    public function team_start($email)
    {
        $vars = array
        (
            'TEAM_START'    => Carbon::now('GMT')->toDateString()
        );

        return $this->send($email, $vars);
    }  


    /**
     * [team_trial description]
     * @param  [type] $email [description]
     * @return [type]        [description]
     */
    public function team_trial($email)
    {
        $vars = array
        (
            'TEAM_TRIAL'    => Carbon::now('GMT')->toDateString()
        );

        return $this->send($email, $vars);
    }  


    /**
     * [send description]
     * 
     * @param  [type] $email [description]
     * @param  [type] $vars  [description]
     * @return [type]        [description]
     */
    private function send($email, $vars) 
    {
        $data = array(
            'id'                => $this->list_id,
            'email'             => array('email'=> $email),
            'merge_vars'        => $vars,
            'double_optin'      => false,
            'update_existing'   => true,
            'replace_interests' => false,
            'send_welcome'      => false
        );

        return $this->mailchimp->call('lists/subscribe', $data);
    }

}