<?php
    global $user;
    $roles = $user->roles;

    if (!empty($roles[1])) {
    	echo "Anonymous";
    } else {
        $user_data = user_load($user->uid);
        $first_name = "";
        $last_name = "";

        if (count($user_data->field_first_name)) {
	       $first_name = $user_data->field_first_name["und"][0]["value"];
        }

        if (count($user_data->field_last_name)) {
            $last_name = $user_data->field_last_name["und"][0]["value"];
        }


       // echo "<pre>" . print_r($user_data, true) . "</pre>";

    	if ($first_name) {
    		echo $first_name . " " . $last_name;
    	} elseif ($last_name) {
    		echo $last_name;
    	}
    }
?>