$memberHash = md5($email);
$api_key = ‘XXXXXXXXXXXXXX-us19’;  //API KEY
$server = ‘us19.’;
$list_id = “XXXXXXX”; // LIST ID
$auth = base64_encode( ‘user:’.$api_key );
$data = array(
‘apikey’ => $api_key,
’email_address’ => $email,
‘status’ => ‘subscribed’,
‘merge_fields’ => array(
‘NAME’ => $name,
),
);
$json_data = json_encode($data);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, ‘https://\’.$server.’api.mailchimp.com/3.0/lists/’.$list_id.’/members/’.$memberHash);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(‘Content-Type: application/json’,
‘Authorization: Basic ‘.$auth));
curl_setopt($ch, CURLOPT_USERAGENT, ‘PHP-MCAPI/2.0’);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_TIMEOUT, 10);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, “PUT”);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_POSTFIELDS, $json_data);
$result = curl_exec($ch);
$result_obj = json_decode($result);
echo $result_obj->status;