<?php
        interface IRobot
        {
                const MODEL1 = "C3PO";
                const MODEL2 = "R2D2";
                const MODEL3 = "TERMINATOR";

                public function helpHuman();
                public function kill();
                public function translate();
        }
        class DarkBot implements IRobot
        {
                private $protocol = IRobot::MODEL1;
                private $astro = IRobot::MODEL2;
                private $terminate = IRobot::MODEL3;

                public function helpHuman()
                {
					return "$protocol: 'Oh dear, I am Afraid I cannot help Humans!' <br>";
                }

                public function kill()
                {
                        return "$terminate: 'I would rather kill the humans!' <br> ";
                }
				public function translate()
                {
                        return "$astro: 'Beep-boop' *with fire spitting from him*";
                }
        }
        $test = new DarkBot();
        echo $test->helpHuman();
        echo $test->kill();
		echo $test->translate();

?>