WooCommerce featured product change hook

Question

I want to hook my custom function whenever any product assigned as featured product or removed from featured product.

I have found that featured product call WC_AJAX on WooCommerce and it don't have any action hook.

Class WC_AJAX woocommerce/includes/class-wc-ajax.php line 505

/**
 * Toggle Featured status of a product from admin.
 */
public static function feature_product() {
    if ( current_user_can( 'edit_products' ) && check_admin_referer( 'woocommerce-feature-product' ) && isset( $_GET['product_id'] ) ) {
        $product = wc_get_product( absint( $_GET['product_id'] ) );

        if ( $product ) {
            $product->set_featured( ! $product->get_featured() );
            $product->save();
        }
    }

    wp_safe_redirect( wp_get_referer() ? remove_query_arg( array( 'trashed', 'untrashed', 'deleted', 'ids' ), wp_get_referer() ) : admin_url( 'edit.php?post_type=product' ) );
    exit;
}

---

Any advice how can i hook my custom function?

Answer 1

In woocommerce/includes/class-wc-ajax.php from line 122 ... 179 it says:

$ajax_events = array(
    'feature_product',
    'mark_order_status',
    ...
);

foreach ( $ajax_events as $ajax_event ) {
    add_action( 'wp_ajax_woocommerce_' . $ajax_event, array( __CLASS__, $ajax_event ) );
}

---

So with that knowledge we can assign our custom function to the hook

function my_callback_function () {
    // Do something
}
add_action( 'wp_ajax_woocommerce_feature_product', 'my_callback_function', 5 );

---

Explanation

Point 1

Hook priority of 5 used - for this ajax call our action has to come before the woocommerce action because the woocommerce action does a redirect.

The default priority is 10

---

Point 2

wp_ajax_

This hook allows you to create custom handlers for your own custom AJAX requests. The wp_ajax_ hook follows the format wp_ajax_$youraction, where $youraction is your AJAX request’s ‘action’ property.

The wp_ajax_ hook only fires for logged-in users.

If you need to also listen for Ajax requests that don’t come from logged-in users.

wp_ajax_nopriv_

This hook is functionally the same as wp_ajax_(action), however it is used to handle AJAX requests on the front-end for unauthenticated users, i.e. when is_user_logged_in() returns false. Unlike wp_ajax_(action) the ajaxurl javascript global property will not be automatically defined and must be included manually or by using wp_localize_script() with admin_url( ‘admin-ajax.php’ ) as the data.

Source: https://jaydeepchauhanblog.wordpress.com/2017/07/14/wordpress-main-different-between-wp_ajax-and-wp_ajax_nopriv/