Are there any specific PHP frameworks or libraries that are well-suited for implementing a basic user management and shopping system like the one described in the forum thread?

One PHP framework that is well-suited for implementing a basic user management and shopping system is Laravel. Laravel provides built-in authentication features for user management and has a robust ecosystem of packages for implementing shopping cart functionality. Additionally, libraries like Stripe or PayPal PHP SDK can be integrated for handling payments.

// Example of using Laravel's built-in authentication for user management
php artisan make:auth

// Example of using Laravel's Eloquent ORM for database interactions
$user = User::create([
    'name' => 'John Doe',
    'email' => 'johndoe@example.com',
    'password' => Hash::make('password'),
]);

// Example of using Laravel's Blade templating engine for displaying shopping cart items
@foreach($cartItems as $item)
    <p>{{ $item->name }} - ${{ $item->price }}</p>
@endforeach

// Example of integrating Stripe PHP SDK for handling payments
$stripe = new \Stripe\StripeClient('sk_test_4eC39HqLyjWDarjtT1zdp7dc');
$paymentIntent = $stripe->paymentIntents->create([
    'amount' => 2000,
    'currency' => 'usd',
]);