In WooCommerce, a hook is an event that is triggered when certain actions occur. This can be something like when a product is added to the cart, or when the checkout process is started. Hooks are used by developers to add custom functionality to their WooCommerce site.
There are two types of hooks in WooCommerce: action hooks and filter hooks. Action hooks are used to trigger an action, such as adding a product to the cart. Filter hooks are used to modify data before it is displayed on the screen.
To call a WooCommerce hook, you need to use the WordPress function do_action(). This function takes two parameters: the hook name, and an optional array of data. For example, to call the ‘woocommerce_add_to_cart’ hook, you would use the following code:
do_action( ‘woocommerce_add_to_cart’, $product_id, $quantity );
The ‘woocommerce_add_to_cart’ hook can be used to trigger a custom action when a product is added to the cart. In this example, we are passing two pieces of data to the do_action() function: the product ID and quantity.
If you’re using a filter hook, you will need to use the WordPress function apply_filters(). This function also takes two parameters: the hook name, and the data that you want to filter. For example, to call the ‘woocommerce_product_price’ filter hook, you would use the following code:
$price = apply_filters( ‘woocommerce_product_price’, $product->get_price(), $product );
In this example, we are calling the ‘woocommerce_product_price’ filter hook and passing two pieces of data: the product price and the product object. The apply_filters() function will return the filtered price after it has been run through all of the active filters.
