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WooCommerce: Get the cart item quantity of a customized product only

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I have modified the functions.php file to include the possibility of customizing certain products with custom text.

This feature comes with an extra cost of 1 which will be shown on product checkout unless the feature hasn’t been fulfilled:

    if (!empty( $cart_item['custom_text'] ) ) {

        $surcharge = 1;
        WC()->cart->add_fee( 'Customization', $surcharge, true, '' );
    }

Naturally, if more customized products are added to the cart, this 1 should be multiplicated by the number of products in the cart. I’ve tried adding the variable $quantity for this purpose:

    if (!empty( $cart_item['custom_text'] ) ) {
            
        $quantity = WC()->cart->get_cart_contents_count();

        $surcharge = 1 * $quantity;
        WC()->cart->add_fee( 'Customization', $surcharge, true, '' );
    }

The problem here is if the client attempts to buy a customized item but not the other, since this method takes into account the total quantity in the cart regardless of it’s customized or not. See figure 1:

aa2

So the question is: is it possible to get only the customized items (circled in green in figure 1) to calculate the surcharge?

 

✔️Solution:

To get the cart item quantity for your customized product only use the following:

if (!empty( $cart_item['custom_text'] ) ) {
    $surcharge = 1;
    $quantity  = $cart_item['quantity'];
    WC()->cart->add_fee( 'Customization', ( $surcharge * $quantity ), true, '' );
}

It should works as you are expecting

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