Simple Cards Fun

Card.php

<?php
/**
 * Card class
 */
class Card
{
    private $deck = null;
    private $pos = null;
    private $suit = '';
    private $rank = '';

    public function __construct($suit, $rank, $pos, $deck) {
        $this->suit = $suit;
        $this->rank = $rank;
        $this->pos = $pos;
        $this->deck = $deck;
    }

    public function curr() {
        return $this;
    }

    public function next() {
        return $this->deck->get($this->pos + 1);
    }

    public function prev() {
        return $this->deck->get($this->pos - 1);
    }

    public function getSuit() {
        return $this->suit;
    }

    public function getRank() {
        return $this->rank;
    }
    
    public function getIndex() {
        return $this->pos;
    }
    
    public function getPosition() {
        return ($this->pos + 1);
    }

    public function getArray() {
        return array($this->suit, $this->rank);
    }
}

Deck.php

<?php
/**
 * Deck class
 */
class Deck
{
    private $sampleSpace = array(
        'suits' => array('Clubs', 'Diamonds', 'Hearts', 'Spades'),
        'ranks' => array('Ace', '2', '3', '4', '5', '6', '7', '8', '9', '10', 'Jack', 'Queen', 'King')
    );
    private $sample = array();
    private $minCount = 4;
    private $cards = array();

    public function __construct($count = null) {
        $this->createSample();
        $this->pickCards($count);
    }

    public function getRandomCard() {
        return $this->cards[array_rand(array_keys($this->cards))];
    }

    public function getTopCard() {
        return $this->cards[0];
    }

    public function getBottomCard() {
        return $this->cards[($this->getCount() - 1)];
    }

    public function getCount() {
        return count($this->cards);
    }

    public function get($index) {
        return isset($this->cards[$index]) ? $this->cards[$index] : null;
    }

    public function getAllCards($asArray = false) {
        $cards = array();
        foreach ($this->cards as $card) {
            $cards[] = $asArray ? $card->getArray() : $card;
        }
        return $cards;
    }

    public function getSample() {
        return $this->sample;
    }
    
    public function shuffle() {
        $cards = $this->cards;
        $this->cards = array();
        shuffle($cards);
        for ($i = 0; $i < count($cards); $i++) {
            $this->cards[$i] = new Card($cards[$i]->getSuit(), $cards[$i]->getRank(), $i, $this);
        }
    }

    private function createSample() {
        foreach ($this->sampleSpace['suits'] as $suit) {
            foreach ($this->sampleSpace['ranks'] as $rank) {
                $this->sample[] = array($suit, $rank);
            }
        }
    }

    private function pickCards($count = null) {
        $tmpSample = $this->sample;
        shuffle($tmpSample);
        if ($count) {
            $deckCount = min(count($tmpSample), $count);
        } else {
            $deckCount = mt_rand($this->minCount, count($tmpSample));
        }
        for ($i = 0; $i < $deckCount; $i++) {
            $this->cards[$i] = new Card($tmpSample[$i][0], $tmpSample[$i][1], $i, $this);
        }
    }
}

example.php

<?php
//$deck = new Deck(15);
$deck = new Deck();

//$card = $deck->getTopCard();
//$card = $deck->getBottomCard();
$card = $deck->getRandomCard();

echo 'Curr Card: ';
print_r($card->getArray());
echo '<br>';
echo 'Curr Card Position: ' . $card->getPosition() . '<br><br>';

if ($prevCard = $card->prev()) {
    echo 'Prev Card: ';
    print_r($prevCard->getArray());
    echo '<br>';
}
if ($nextCard = $card->next()) {
    echo 'Next Card: ';
    print_r($nextCard->getArray());
    echo '<br>';
}

echo '<br>Deck Count: ' . $deck->getCount();
echo '<pre>';
print_r($deck->getAllCards(true));
echo '</pre>';
$deck->shuffle();
echo '<pre>';
print_r($deck->getAllCards(true));
echo '</pre>';

echo '<br>Sample Space: ';
echo '<pre>';
print_r($deck->getSample());
echo '</pre>';