Implementação simples da API MailChimp para inscrever o usuário

<?php

/**
* MailChimp API documentation:

* http://apidocs.mailchimp.com/api/

*/


require_once
'MCAPI.class.php'; # Download: http://apidocs.mailchimp.com/api/downloads/

# Configuration
$config
= array(
'apiKey' => 'API-KEY',
'listId' => 'LIST-ID',
'email' => $_POST['email'],
);

# Error codes available at: http://apidocs.mailchimp.com/api/1.3/exceptions.field.php
$errorCodes
= array(
230 => 'You already subscribed to this mailing list. Thanks!',
232 => 'This isn't valid e-mail address.',
);

$api
= new MCAPI($config['apiKey']);

//var_dump($api->lists()); # Uncomment this to get ID's of mailing lists and select proper list ID.

?>
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Mailing</title>
</head>
<body>
<h1>Mailing</h1>
<?php if (filter_var($config['email'], FILTER_VALIDATE_EMAIL)): ?>
<?php if ($api->listSubscribe($config['listId'], $config['email'])): ?>
<p style="background:lightgreen">Success</p>
<?php else: ?>
<p style="background:red">Error</p>
<p>Error code: <?php echo $api->errorCode; ?></p>
<p>Error message: <?php echo $errorCodes[$api->errorCode]; ?></p>
<?php endif; ?>
<?php else: ?>
<form action="
<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
<input type="email" name="email">
<input type="submit">
</form>
<?php endif; ?>
</body>
</html>