WooCommerce: Get $cart_item in price function

I’m using a custom function to change the style of the product price.

This is my actual function:

add_filter( 'woocommerce_format_sale_price', function( $price, $regular_price, $sale_price ) {
    // stuff happens here
}, 10, 3 );

It works fine on product detail pages if I want some meta fields from the product.

I can get these meta fields if I use global $product and go from there.

The problem is, that global $product throws an error if used on the cart/checkout page.

So I’m using is_product() and is_cart() to check where I am.

But I couldn’t figure out how to get the meta fields from a product in the cart.

I know, that I could use $cart_item like $product. But it seems that there is no way to use that with global.

Is there any other way to get the cart item in the function above?

Answer

You can use WC()->cart to get cart object. then you can loop it using $cart->get_cart() to get cart_item. try below code.

add_filter( 'woocommerce_format_sale_price', function( $price, $regular_price, $sale_price ) {
    if ( WC()->cart ) {
        $cart = WC()->cart; // Get cart
        if ( ! $cart->is_empty() ) {
            foreach ( $cart->get_cart() as $cart_item_key => $cart_item ) {
                $product_id = $cart_item['product_id'];
                // stuff happens here
            }
        }
    }
}, 10, 3 );