csp-custom-condition-loader.php

<?php
/**
 * Plugin Name: WooCommerce Conditional Shipping and Payments - Custom Condition loader.
 * Plugin URI: https://woocommerce.com/products/conditional-shipping-and-payments/
 * Description: Use this plugin to load a custom condition.
 * Version: 1.0
 * Author: WooCommerce
 * Author URI: https://woocommerce.com/
 * Developer: Jason Kytros
 *
 * Requires at least: 2.6.0
 * Tested up to: 5.7
 *
 * Copyright: © 2021 Automattic.
 * License: GNU General Public License v3.0
 * License URI: http://www.gnu.org/licenses/gpl-3.0.html
 */

add_filter( 'woocommerce_csp_conditions', 'add_custom_condition' );

function add_custom_condition( $load_conditions ) {
  	// Use the path to your custom condition file here.
	require_once( 'class-wc-csp-condition-day-of-week.php' );
  
	$load_conditions[] = 'WC_CSP_Condition_Day_of_Week';

	return $load_conditions;
}