<?php

$suits = array("Clubs", "Diamonds", "Hearts", "Spades");
$cards = array("Ace", "2", "3", "4", "5", "6", "7", "8", "9", "10", "Jack", "Queen", "King");

$deck = array();
foreach($suits as $suit) {
    foreach($cards as $card) {
        $deck[] = $card . ' of ' . $suit;
    }
}

$num = 5;
shuffle($deck);
$cards = array_slice($deck, 0, $num);

echo implode(PHP_EOL, $cards);