<?php
    public function showAllProducts()
    {
        global $mysqli;
    
        $stmt = $mysqli->query("SELECT * FROM `products`");
        while($x = $stmt->fetch_assoc())
        {
            
                ?><img src="<?php echo $x['image'] ?>" width="100" height="80">
                <form method="post">
                            <input type="hidden" name="id" value="<?php echo $x['id'] ?>">
                            <input style="width: 40px;" type="number" min="0" name="amount">
                            <input type="submit" value="Toevoegen!" name="submit">
                        </form>
               <?php
        }
        
    }

<?php


class Controller {


	public function index() {
		$viewData = array(
			"user" => "Stefan",
			"age" => 21,
		);
		
		$view = new View('view', $viewData);
		$view->render();
	}


}

<?php


class View {
	private $viewName;
	private $viewData;
	
	public function View($viewName, $viewData) {
		$this->viewName = $viewName;
		$this->viewData = $viewData;
	}
	
	public function render() {
		extract($this->viewData);
		require $this->viewName . ".php";
	}
}