woocommerce_order_details_after_customer_details │ action-hook │ WC 1.0

Usage

add_action( 'woocommerce_order_details_after_customer_details', 'wp_kama_woocommerce_order_details_after_customer_action' );

/**
 * Function for `woocommerce_order_details_after_customer_details` action-hook.
 * 
 * @param  $order 
 *
 * @return void
 */
function wp_kama_woocommerce_order_details_after_customer_action( $order ){

	// action...
}

$order

-

Where the hook is called

<?php do_action( 'woocommerce_order_details_after_customer_details', $order ); ?>

Where the hook is used in WooCommerce

add_action( 'woocommerce_order_details_after_customer_details', array( $this, 'render_order_additional_fields' ), 10 );