Display custom messages and links for empty cart on checkout pages

custom-empty-cart-messages.php

<?php// Do not copy this line

// Copy from under this line and paste into your child theme's functions.php

add_filter( 'lifterlms_pre_checkout_error', 'llms_custom_empty_cart_message' );

function llms_custom_empty_cart_message(){

	if ( isset( $_GET['plan'] ) && is_numeric( $_GET['plan'] ) ) {
		return false;
	}

	if ( isset( $wp->query_vars['confirm-payment'] ) ) {
		return false;
	}

	$custom_message = 'Your cart is currently empty. Click <a href="https://custom/link/here">here</a> to get started.';

	return $custom_message;

}