woocommerce_checkout_before_customer_details │ action-hook │ WC 1.0

Usage

add_action( 'woocommerce_checkout_before_customer_details', 'wp_kama_woocommerce_checkout_before_customer_details_action' );

/**
 * Function for `woocommerce_checkout_before_customer_details` action-hook.
 * 
 * @return void
 */
function wp_kama_woocommerce_checkout_before_customer_details_action(){

	// action...
}

Where the hook is called

<?php do_action( 'woocommerce_checkout_before_customer_details' ); ?>

Where the hook is used in WooCommerce

add_action( 'woocommerce_checkout_before_customer_details', array( $this, 'render_buttons_container' ) );

add_action( 'woocommerce_checkout_before_customer_details', 'wc_get_pay_buttons', 30 );