BlackJack.php

<?php
/**
 * Created by IntelliJ IDEA.
 * User: Richard Miles
 * Date: 6/27/2018
 * Time: 4:05 PM
 *
 * A 6-Deck blackjack card counting game
 *
 * 2-6 is +1
 * 10-A is -1
 *
 * Whats the count?
 */

$deck = [
    'a', '2', '3', '4', '5', '6',
    '7', '8', '9', '10', 'j', 'q', 'k',
];

$deck = array_merge($deck,$deck,$deck,$deck);

$deck = array_merge($deck,$deck,$deck,$deck,$deck,$deck);

$count = 0;

STDIN;

do {
    $key = random_int(0,count($deck) - 1);
    print $key . ') '.  $deck[$key] . PHP_EOL;

    switch ($deck[$key]){
        case '2':
        case '3':
        case '4':
        case '5':
        case '6':
            $count++;
            break;
        case '10':
        case 'j':
        case 'q':
        case 'k':
        case 'a':
            $count--;
            break;
        default:
            break;
    }

    $guess = readline('Whats the count?');

    if ((string)$guess === (string) $count){
        print 'You\'re a god! The count is ' . $count . PHP_EOL;
    } else {
        print 'You suck! The count is ' . $count . PHP_EOL;
    }

    unset($deck[$key]);
}while (count($deck));