WooCommerce: Set a minimum amount at checkout

woocommerce-set-minimum-checkout-order-amount.php

/**
 * Set a minimum amount for checkout
 */
function zpd_wc_minimum_order_amount(): void {
	/**
	 * $minimum is the minimum value you want to set the checkout total order amount.
	 */
	$minimum = 50;

	/**
	 * Check the current cart total
	 */
	if ( WC()->cart->total < $minimum ) {

		if( is_cart() ) {

			wc_print_notice(
				sprintf( 'Your current order total is %s - you must have an order with a minimum of %s to place your order ' ,
					wc_price( WC()->cart->total ),
					wc_price( $minimum )
				), 'error'
			);

		} else {

			wc_add_notice(
				sprintf( 'Your current order total is %s - you must have an order with a minimum of %s to place your order' ,
					wc_price( WC()->cart->total ),
					wc_price( $minimum )
				), 'error'
			);

		}
	}
}
add_action( 'woocommerce_checkout_process', 'zpd_wc_minimum_order_amount' );
add_action( 'woocommerce_before_cart' , 'zpd_wc_minimum_order_amount' );