Example plugin - Set mininum order in WooCommerce

set_minimum_order_example_plugin.php

<?php
/**
 * @link     https://www.letsgodev.com/
 * @since    1.0.0
 * @package  Plugins/LetsGoDev/PluginExample
 *
 * Plugin Name:          Set minimum order
 * Plugin URI:           https://www.letsgodev.com/
 * Description:          This plugin is an example
 * Version:              1.0.0
 * Author:               Lets Go Dev
 * Author URI:           https://www.letsgodev.com/
 * Developer:            Alexander Gonzales
 * Developer URI:        https://vcard.gonzalesc.org/
 * License:              GPL-3.0+
 * License URI:          https://www.gnu.org/licenses/gpl-3.0.txt
 * Text Domain:          custom plugin, example plugin, create plugin
 * Requires Plugins:     woocommerce
 * WP stable tag:        6.5.0
 * WP requires at least: 6.5.0
 * WP tested up to:      6.7.0
 * WC requires at least: 9.2.0
 * WC tested up to:      9.4.1
 */

add_action( 'woocommerce_check_cart_items', 'setMinimumOrder2' );

/**
 * Set minimum order
 * @return void
 */
function setMinimumOrder2(): void {
	if ( ! is_cart() && ! is_checkout() ) {
		return;
	}
	
	$limitSubtotal = 150;
	
	// Check if subtotal
	if ( WC()->cart->get_subtotal() > $limitSubtotal ) {
		return;
	}
	
	$message = sprintf(
		esc_html__(
			'Remember that to finalize your purchase you must reach a minimum amount of %s.',
			'letsgo'
		),
		wc_price( $limitSubtotal )
	);
	
	wc_add_notice( $message, 'error' );
}