woocommerce_pre_customer_bought_product │ filter-hook │ WC 1.0

Usage

add_filter( 'woocommerce_pre_customer_bought_product', 'wp_kama_woocommerce_pre_customer_bought_product_filter', 10, 4 );

/**
 * Function for `woocommerce_pre_customer_bought_product` filter-hook.
 * 
 * @param  $null           
 * @param  $customer_email 
 * @param  $user_id        
 * @param  $product_id     
 *
 * @return 
 */
function wp_kama_woocommerce_pre_customer_bought_product_filter( $null, $customer_email, $user_id, $product_id ){

	// filter...
	return $null;
}

$null

-

$customer_email

-

$user_id

-

$product_id

-

Where the hook is called

$result = apply_filters( 'woocommerce_pre_customer_bought_product', null, $customer_email, $user_id, $product_id );

Where the hook is used in WooCommerce