Component example

CartPreviewComponent.php

<?php

class CartPreviewComponent {
  
  public function __construct(CartModel $cartModel, $userId){
    $this->cartModel = $cartModel;
    $this->userId = $userId;
  }
  
  public function render(){
    return view('CartPreviewComponentTemplate', ['items' => $this->getItems()]);
  }
  
  public function getItems(){
    return $this->cartModel->getUserCart($this->userId);
  }
  
  
}

CartPreviewComponentTemplate.blade.php

You have {{ count($items) }} items in your cart.

index.blade.php

{{ $cartPreviewComponent }}

ProductController.php

<?php

class ProductController {
  
  public function index() {
    return view('index', ['cartPreviewComponent' => $this->createCartPreviewComponent()])
  }
  
  public function createCartPreviewComponent(){
    return new CartPreviewComponent($cartModel, $userId); 
  }
}