<?php
    $weapons = ['fists', 'whip', 'gun'];
    $opponentWeapon = $weapons[rand (0,2)];
    $indyWeapon = '';
        if ('fists'== $opponentWeapon){
            $indyWeapon = "gun";
        }
        elseif ('gun'== $opponentWeapon){
            $indyWeapon = "whip";
        }
        elseif ( 'whip'==$opponentWeapon){
            $indyWeapon = "fists";
        }
        echo $indyWeapon;