Seperate cart items if the product is added twice in WooCommerce

[sebastian-moran]

Seperate cart items if the product is added twice in WooCommerce.

Snippet Type

Execute on Child Sites

Snippet

add_filter( 'woocommerce_add_cart_item_data', 'filter_add_cart_item_data' );
function filter_add_cart_item_data( $cart_item_data ) {
    if ( ! isset($cart_item_data['unique_key']) ) {
        $cart_item_data['unique_key'] = md5(microtime().rand());
    }
    return $cart_item_data;
}


add_action( 'woocommerce_add_to_cart', 'split_cart_items_by_quantity', 10, 6 );
function split_cart_items_by_quantity( $cart_item_key, $product_id, $quantity, $variation_id, $variation, $cart_item_data ) {
    if ( $quantity == 1 ) return;
        
    // Keep the product but set its quantity to 1
    WC()->cart->set_quantity($cart_item_key, 1);

    // Loop through each unit of item quantity
    for ( $i = 1; $i <= $quantity -1; $i++ ) {
        // Make each quantity item unique and separated
        $cart_item_data['unique_key'] = md5(microtime().rand());

        // Add each item quantity as a separated cart item
        WC()->cart->add_to_cart( $product_id, 1, $variation_id, $variation, $cart_item_data );
    }
}