PHP – How to Add a Custom Product to Cart in Magento 1.9

addtocartcartcustom-optionsmagento-1.9PHP

Please bear with me, I'm new to Magento and PHP.

I've been looking for hours for this but unfortunately I cannot make it to work. All other questions made didn't explained where to get the variables.

Can someone explain to me how to get this working?
I don't know which parameters to pass to the code to add the product to the cart…

What I need to do is to include a custom product to the cart after a person chose it from different options on a form. I have the form working.

I guess I need to modify the code below with ID's and such, but I have no idea where to get the data I need to fill in…

// Add a product (simple); id:12,  qty: 1
$cart->addProduct(12, 1);

// Add a product with custom options
$productInstance = Mage::getModel('catalog/product')->load($productId);
$param = array(
    'product' => $productInstance->getId(),
    'qty' => 1,
    'options' => array(
        234 => 'A value'  // Custom option with id: 234
    )
);

This is what I have:

require_once '../app/Mage.php'; 

umask(0);  
Mage::init('default');
Mage::getSingleton('core/session', array('name' => 'frontend'));  

// Get customer session
$session = Mage::getSingleton('customer/session'); 

// Get cart instance
$cart = Mage::getSingleton('checkout/cart'); 
$cart->init();

// Add a product (simple); id:12,  qty: 1
$cart->addProduct(12, 1);

// Add a product with custom options
$productInstance = Mage::getModel('catalog/product')->load($productId);
$param = array(
    'product' => $productInstance->getId(),
    'qty' => 1,
    'options' => array(
        234 => 'A value'  // Custom option with id: 234
    )
);
$request = new Varien_Object();
$request->setData($param);
$cart->addProduct($productInstance, $request);

// Set shipping method
$quote = $cart->getQuote();
$shippingAddress = $quote->getShippingAddress();
$shippingAddress->setShippingMethod('flatrate_flatrate')->save();               

// update session
$session->setCartWasUpdated(true);

// save the cart
$cart->save();

—Edit—

This is the message I get:

Fatal error: Uncaught exception 'Mage_Core_Exception' with message 'Please specify the product required option(s).' in C:\xampp\htdocs\inc\app\Mage.php:595 Stack trace: #0 C:\xampp\htdocs\inc\app\code\core\Mage\Checkout\Model\Cart.php(284): Mage::throwException('Please specify ...') #1 C:\xampp\htdocs\inc\mixform\form.php(71): Mage_Checkout_Model_Cart->addProduct(Object(Mage_Catalog_Model_Product), Array) #2 {main} thrown in C:\xampp\htdocs\inc\app\Mage.php on line 595

Best Answer

This is kind of difficult to answer without knowing what kind of custom options you've set up for this product. I suggest logging $param from the cart controller add action.

Enable logging in system configuration, temporarily place this code in Mage_Checkout_CartController::addAction, and go add the product with the custom options to the cart on the frontend.

class Mage_Checkout_CartController extends Mage_Core_Controller_Front_Action
{
    ...
    public function addAction()
    {
        ...
        Mage::log($params);  // Place this code
        $cart->addProduct($product, $params);
        ...
    }
    ...
}

Examine what $params looks like and build it accordingly in your script.

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