How can PHP be used to create a "Bibliotheken-System" where users can create their own collections/decks from a pool of cards?

To create a "Bibliotheken-System" where users can create their own collections/decks from a pool of cards, you can use PHP to create a web application that allows users to browse through a list of available cards, select the ones they want to add to their collection, and organize them into decks. Users can then view and manage their collections, as well as share them with others.

<?php
// Sample PHP code for creating a Bibliotheken-System

// Define an array of available cards
$cards = array(
    "Card 1",
    "Card 2",
    "Card 3",
    // Add more cards as needed
);

// Function to display available cards
function displayAvailableCards($cards) {
    foreach ($cards as $card) {
        echo $card . "<br>";
    }
}

// Function to add a card to a user's collection
function addToCollection($card, &$collection) {
    $collection[] = $card;
}

// Sample usage
$userCollection = array();
addToCollection("Card 1", $userCollection);
addToCollection("Card 3", $userCollection);

// Display user's collection
echo "User's Collection:<br>";
foreach ($userCollection as $card) {
    echo $card . "<br>";
}
?>