I was asked in a job interview to deal 5 random playing cards to n number of players

dealCards.php

<?php
class Deck {
    protected $suits = array('Hearts', 'Spades', 'Clubs', 'Diamonds');
    protected $ranks = array('Ace', '2', '3', '4', '5', '6', '7', '8', '9', '10', 'Jack', 'Queen', 'King');

    public function cards() {
        $cards = [];
        foreach($this->suits as $suit) {
            foreach($this->ranks as $rank) {
                $cards[] = $rank . " of " . $suit;
            }
        }

        return $cards;
    }
}

class Game extends Deck {

    // Index of card array
    private $index = 0;
    private $cards = [];

    public function shuffle() {

        // Assign cards to variable
        $this->cards = $this->cards();

        // Randomise cards
        uksort($this->cards, function() { return rand() > rand(); });

        // Rebase cards array
        $this->cards = array_values($this->cards);
    }

    public function nextCard() {

        // Increment index
        $this->index++;

        // Return next index in array
        return $this->cards[$this->index];
    }

    public function deal($players) {
        $output = [];

        // For each player
        for($i=1;$i<=$players;$i++) {

            // Add 5 cards
            for($c=0;$c<5;$c++) {
                $output[$i][] = $this->nextCard();
            }
        }

        return $output;
    }

}

$game = new Game();
$game->shuffle();
$deal = $game->deal(3);
print_r($deal);
// Deal 5 cards to `n` number of players