I am having trouble with my numberOfDecks method. I try to call the array of cards that is created in my constructor, but the an error keeps coming up that I am passing an undefined variable ($cards). I thought since it is a global variable $cards would be able to be called to the numberOfDecks method.
<?php
/* creating a deck of cards class to be used in a blackJack game*/
class Deck{
public $cards = array();
//creates an instance of a deck of cards (works)
public function __construct(){
$values =array('2','3','4','5','6','7','8','9','10','J','Q','K','A');
$suits =array('Diamond','Club','Heart','Spade');
foreach ($suits as $suit) {
foreach($values as $value){
$this->cards[] = "$value of $suit's";
}
}
}
/*trying to add more decks to increase number of total cards
in my array (does not work)*/
public function numberOfDecks($number){
$this->cards = $cards;
$this->number= $number;
for($i = 0 ; $i < $number; $i++){
array_push($cards[],$i);
}
return $cards;
}
}
$deck = new Deck();//works as expected
$deck->numberOfDecks(3);//trouble
$shuffled = shuffle($deck->cards);//works as expected
var_dump($deck);
Your variable $cards is undefined because you don't declare it.
public function numberOfDecks($number){
$this->cards = $cards;
You probably meant to flip the assignment direction.
$cards = $this->cards;
Given your comment for adding decks to the object total deck, after flipping the assignment direction, try using array_merge
<?php
class Deck{
public $cards = array();
//creates an instance of a deck of cards (works)
public function __construct(){
$values =array('2','3','4','5','6','7','8','9','10','J','Q','K','A');
$suits =array('Diamond','Club','Heart','Spade');
foreach ($suits as $suit) {
foreach($values as $value){
$this->cards[] = "$value of $suit's";
}
}
}
public function numberOfDecks($number){
$cards = $this->cards;
$this->number = $number;
for($i = 0 ; $i < $number; $i++){
$this->cards = array_merge($this->cards, $cards);
}
}
}
$deck = new Deck();//works as expected
// how many cards are intially constructed?
echo "count of cards in new deck: " . count($deck->cards) . "\n<br/>\n";
// add 3 more decks of cards
$deck->numberOfDecks(3);//trouble
echo "count of cards after adding 3 decks: " . count($deck->cards);
// $shuffled = shuffle($deck->cards);//works as expected
// var_dump($deck);
Results in this output:
count of cards in new deck: 52
count of cards after adding 3 decks: 208
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