Prestashop 1.6 -如何从我的模块的php页面将我的产品放入购物车

<?php
if (!defined('_PS_VERSION_')) {
    exit;
}

class MyCustomModule extends Module
{
    public function __construct()
    {
        $this->name = 'mycustommodule';
        $this->tab = 'front_office_features';
        $this->version = '1.0.0';
        $this->author = 'Your Name';
        $this->need_instance = 0;

        parent::__construct();

        $this->displayName = $this->l('My Custom Module');
        $this->description = $this->l('Adds products to the shopping cart');
    }

    public function install()
    {
        if (!parent::install() ||
            !$this->registerHook('displayHeader') ||
            !$this->registerHook('actionFrontControllerSetMedia') ||
            !$this->registerHook('displayProductButtons'))
            return false;

        return true;
    }

    public function hookDisplayProductButtons($params)
    {
        $productId = $params['product']['id_product'];
        $quantity = 1;
        $cart = new Cart();
        $cart->addProduct($productId, $quantity);
    }
}