Odysseus forces Cassandra reveal her private nickname using horse. :D

Trojan.php

<?php

class Trojan {
        private $priv;
        function __construct($priv) {
                $this->priv=$priv;
        }
        function horse(Trojan $t) {
                return $t->priv;
        }
}

$cassandra=new Trojan("sandy");

$odysseus=new Trojan("der Listenreiche");

echo $odysseus->horse($cassandra)."\n"; // "sandy"