问添加到购物车woocommerce时为购物车项目设置密钥

EN

add_filter( 'woocommerce_add_cart_item_data', 'set_custom_cart_item_key', 10, 4 );
function set_custom_cart_item_key( $cart_item_data, $product_id, $variation_id, $quantity ) {
    $cart_item_data['unique_key'] = md5( microtime().rand() );
    WC()->session->set( 'custom_data', $cart_item_data['unique_key'] );

    return $cart_item_data;
}

// Load cart item data - may be added by other plugins.
$cart_item_data = (array) apply_filters( 'woocommerce_add_cart_item_data', $cart_item_data, $product_id, $variation_id, $quantity );

// Generate a ID based on product ID, variation ID, variation data, and other cart item data.
$cart_id        = $this->generate_cart_id( $product_id, $variation_id, $variation, $cart_item_data );