WordPress at a glance
action is not described

woocommerce_pay_order_before_submit action-hook . WC 1.0

Usage

add_action( 'woocommerce_pay_order_before_submit', 'action_function_name_9105' );
function action_function_name_9105(){
	// action...
}

Where the hook is called

In file: /templates/checkout/form-pay.php
woocommerce_pay_order_before_submit
woocommerce/templates/checkout/form-pay.php 89
<?php do_action( 'woocommerce_pay_order_before_submit' ); ?>

Where in WP core the hook is used WooCommerce

Usage not found.