WC Vendors Pro - Cart/Checkout Filter

functions.php

/* WC Vendors Pro - Cart/Checkout Filter
 * This is just an example of the WooCommerce checkout process and cart pages to "check" something and display an error of some
 * sort.  This code does nothing as it is, you'd have to write it inside the custom_checkout_filter function.  Some
 * notes are there to give you an idea on how to get data from the cart, and the WooCommerce notices function that
 * shows a pretty box with a message.  Have fun.
*/
add_action( 'woocommerce_checkout_process', 'custom_checkout_filter' );
add_action( 'woocommerce_before_cart' , 'custom_checkout_filter' );

function custom_checkout_filter() {
        // Do stuff here.
        // WC()->cart->total will get you the total.  Google WC()->cart to find other cool things you can do!
        // Vendors are post_authors.  So, if you need the vendor ID, get the post_author from the products ID, and there you go!
        
        // wc_print_notice( 'This error will appear at the top!  So, if you have some cool custom message to display within the function, this message would show up @ top of cart and checkout pages.' ), 'error' );
}