How do I pass multiple custom fields to cart in Woocommerce?

Question

I have code which passes a single custom field to the shopping cart. This is made possible through the $item_data array. How can I expand the array to add another item? For instance the enrolmentId?

The code is below:

function display_enrolment_text_cart( $item_data, $cart_item ) {
    if ( empty( $cart_item['enrolmentName'] ) ) {
        return $item_data;
    }

    $item_data[] = array(
        'key'     => __( 'Enrolment', 'test' ),
        'value'   => wc_clean( $cart_item['enrolmentName'] ),
        'display' => '',
    );

        // add another item to the $item_data[] array

    return $item_data;
}

add_filter( 'woocommerce_get_item_data', 'display_enrolment_text_cart', 10, 2 );

LoicTheAztec · Accepted Answer · 2019-03-30T15:45:38.907

The code tha you are using is not passing any item to cart, it's just displaying existing custom cart item data.

To add custom cart item data from additional product fields or something else related, you will use something like (requires some additional fields on single product pages for example):

add_filter( 'woocommerce_add_cart_item_data', 'add_custom_cart_item_data', 10, 3 ); 
function add_custom_cart_item_data($cart_item_data, $product_id, $variation_id ){
    if( isset( $_POST['product_field1'] ) ) {
        $cart_item_data['custom_data'][1] = sanitize_text_field( $_POST['product_field1'] );
    }
    if( isset( $_POST['product_field2'] ) ) {
        $cart_item_data['custom_data'][2] = sanitize_text_field( $_POST['product_field2'] );
    }
    return $cart_item_data;
}

Now to display that custom cart item data in cart and checkout pages:

add_filter( 'woocommerce_get_item_data', 'display_enrolment_text_cart', 10, 2 );
function display_enrolment_text_cart( $item_data, $cart_item ) {
    if ( isset($cart_item['enrolmentName']) && ! empty($cart_item['enrolmentName']) ) {
        $item_data[] = array(
            'key'     => __( 'Enrolment', 'test' ),
            'value'   => wc_clean( $cart_item['enrolmentName'] ),
            'display' => '',
        );
    }

    // Additional displayed custom cat item data
    if ( isset($cart_item['custom_data'][1]) && ! empty($cart_item['custom_data'][1])  ) {
        $item_data[] = array(
            'key'     => __( 'Field 1', 'test' ),
            'value'   => wc_clean( $cart_item['custom_data'][1] ),
            'display' => '',
        );
    }

    if ( isset($cart_item['custom_data'][2]) && ! empty($cart_item['custom_data'][2])  ) {
        $item_data[] = array(
            'key'     => __( 'Field 2', 'test' ),
            'value'   => wc_clean( $cart_item['custom_data'][2] ),
            'display' => '',
        );
    }
    return $item_data;
}

Code goes in function.php file of your active child theme (or active theme). It should works.

Related thread: Store custom data using WC_Cart add_to_cart() method in Woocommerce 3

Related complete thread: Add custom field in products to display in cart, checkout and in orders

Thanks @Loic. So it's actually woocommerce_add_cart_item_data that inserts the data into the database and will appear in purchase confirmation e-mails etc? — John Smith, Mar 30 '19 at 15:39
No… That only pass the data to cart as custom cart item data (and the 2nd code display it in cart and checkout pages)… To save that custom cart item data to the order (and display it on orders and email notifications, you will use `woocommerce_checkout_create_order_line_item` hook like in [those answers](https://stackoverflow.com/search?tab=newest&q=user%3a3730754%20woocommerce_checkout_create_order_line_item)… If you use any code from stackOverFlow, don't forget to upvote the useful answers. Thank you. — LoicTheAztec, Mar 30 '19 at 15:48

How do I pass multiple custom fields to cart in Woocommerce?

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