'your access token', 'refresh_token' => 'your refresh token'); $wrap = new CS_REST_Subscribers('Your list ID', $auth); $result = $wrap->update('Old Email Address', array( 'EmailAddress' => 'New Email Address', 'Name' => 'Subscriber name', 'CustomFields' => array( array( 'Key' => 'Field Key', 'Value' => 'Field Value' ) ), 'Resubscribe' => true )); echo "Result of PUT /api/v3.1/subscribers/{list id}.{format}?email={email}\n
"; if($result->was_successful()) { echo "Subscribed with code ".$result->http_status_code; } else { echo 'Failed with code '.$result->http_status_code."\n
";
    var_dump($result->response);
    echo '
'; }