Hide other rates when Advanced Shipping is available.

advanced-shipping-hide-other-rates-when-was-is-available.php

<?php

/**
 * Copy from here to your (child) themes functions.php
 * Recommended to do so via FTP.
 */

/**
 * Only show Advanced Shipping rates when available.
 *
 * Hides all non-Advanced Shipping rates..
 */
function custom_hide_other_rates_when_advanced_shipping_is_available( $shipping_rates) {

	$was_rates = array();

	foreach ( $shipping_rates as $key => $rate ) {

		// Check for Advanced Shipping rates
		if ( $rate->method_id == 'advanced_shipping' ) {
			$was_rates[ $key ] = $rate;
		}

	}

	// Show all/only Advanced Shipping rates
	if ( ! empty( $was_rates) ) {
		return $was_rates;
	}

	return $shipping_rates;

}
add_filter( 'woocommerce_package_rates', 'custom_hide_other_rates_when_advanced_shipping_is_available' );