Woocommerce在添加到购物车之前重定向到自定义页面

Question

I am trying to redirect to a custom page before adding item to cart because I want to authenticate few information before user can really add the item to cart.

How can set a page where user redirect when click on Add To Cart and give some pre cart information and then click on Proceed to adding to cart?

This is my first Woocommerce site, so I am having some trouble. So far what I have found in tutorial is this code.

function custom_add_to_cart_redirect() { 
    return 'http://www.yourdomain.com/your-page/'; 
}
add_filter( 'woocommerce_add_to_cart_redirect', 'custom_add_to_cart_redirect' );

But it add the cart first then redirect to this custom page. But I want to redirect without adding to cart.

Please help

Answer 1

add_to_cart_action() is called as an action on 'wp_loaded'.

add_action( 'wp_loaded', array( __CLASS__, 'add_to_cart_action' ), 20 );

so you can execute your handler before add_to_cart_action() by:

add_action( 'wp_loaded', array( __CLASS__, 'your handler' ), 19 );

NB add_to_cart_action() first checks that this is really an add to cart request and just returns if it is not by:

if ( empty( $_REQUEST['add-to-cart'] ) || ! is_numeric( $_REQUEST['add-to-cart'] ) ) {
    return;
}

See add_to_cart_action() in ...\\woocommerce\\includes\\class-wc-form-handler.php

You need to do this as 'wp_loaded' is called on all requests. After requesting the redirect wp_safe_redirect() you need to exit to prevent add_to_cart_action() from running on this request. After verification the redirect processing needs to invoke the original request again with some indication that the request is now verified.

PS I agree with the comment made by cale_b - doing the verification is probably easier done earlier.