Configure scheduling of automatic documents on Invoicing with InvoiceXpress for WooCommerce

schedule.php

<?php

/* Schedule invoicing documents */
add_filter( 'invoicexpress_woocommerce_delay_automatic_invoice', '__return_true' );
add_filter( 'invoicexpress_woocommerce_delay_automatic_invoice_time', function() {
	return 'PT2M'; //2 minutes
});

/* Schedule transport guides */
add_filter( 'invoicexpress_woocommerce_delay_automatic_guide', '__return_true' );
add_filter( 'invoicexpress_woocommerce_delay_automatic_guide_time', function() {
	return 'PT2M'; //2 minutes
});

/*
* DateInterval formats - https://www.webfx.com/blog/web-design/php-dateinterval-class/
* 'PT2M' - 2 minutes
* 'PT2H' - 2 hours
* 'P2D'  - 2 days
*/