/*
A standard deck of 52 playing cards consists of four suits:
spades (♠), hearts (♥), diamonds (♦), and clubs (♣).
Each suit contains 13 ranks:
Ace, 2, 3, 4, 5, 6, 7, 8, 9, 10, Jack, Queen, King.
Cards of spades and clubs are black, while hearts and diamonds are red.
Color is informational only — it does not affect shuffling or random selection.
*/
/*
This program performs multiple draws of 5 random cards from a 52‑card deck
WITHOUT duplicates across draws.
It uses:
- Arrays for ranks, suits, and the deck
- shuffle() for efficient randomization (Fisher–Yates internally)
- Functions for clean structure
Algorithm:
1. Build a full deck (52 cards)
2. For each draw:
a. Shuffle the remaining deck
b. Draw 5 cards
c. Remove them from the deck
*/
function buildDeck(): array {
$ranks = ["2","3","4","5","6","7","8","9","10","J","Q","K","A"];
$suits = ["Clubs", "Diamonds", "Hearts", "Spades"];
$deck = [];
foreach ($suits as $suit) {
foreach ($ranks as $rank) {
$deck[] = "$rank of $suit";
}
}
return $deck;
}
function drawFive(array &$deck, int $drawNumber): void {
// Shuffle the remaining deck before this draw
shuffle($deck);
echo "Draw #$drawNumber:\n";
for ($i = 0; $i < 5; $i++) {
echo " {$deck[$i]}\n";
}
echo "\n";
// Remove drawn cards
array_splice($deck, 0, 5);
}
function main(): void {
// Number of draws
$draws = 3;
// Build the deck
$deck = buildDeck();
// Perform multiple draws (no duplicates)
for ($i = 1; $i <= $draws; $i++) {
if (count($deck) < 5) {
echo "Not enough cards left for draw #$i.\n";
break;
}
drawFive($deck, $i);
}
}
main();
/*
run:
Draw #1:
Q of Clubs
9 of Clubs
Q of Spades
9 of Spades
A of Hearts
Draw #2:
Q of Hearts
10 of Clubs
5 of Clubs
J of Spades
7 of Clubs
Draw #3:
K of Clubs
6 of Diamonds
A of Diamonds
K of Diamonds
K of Spades
*/
