function.php

add_filter(
	'woocommerce_package_rates',
	function ($rates) {
		$customer = WC()->session->get('customer');
		$address = !empty($customer['shipping_address_1'])
			? urlencode($customer['shipping_address_1'])
			: false;
		$city = !empty($customer['shipping_city'])
			? urlencode($customer['shipping_city'])
			: false;
		$state = !empty($customer['shipping_state'])
			? urlencode($customer['shipping_state'])
			: false;

		if (!$address || !$city || !$state) {
			return $rates;
		}

		$url = "https://geocoding.geo.census.gov/geocoder/locations/address?street={$address}&city={$city}&state={$state}&benchmark=2020&format=json";

		$ch = curl_init();
		curl_setopt($ch, CURLOPT_URL, $url);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
		$output = curl_exec($ch);
		curl_close($ch);

		$output = json_decode($output);

		if (count($output->result->addressMatches) == 0) {
			$rates = [];
			return $rates;
		}

		$x = $output->result->addressMatches[0]->coordinates->x;
		$y = $output->result->addressMatches[0]->coordinates->y;

		$location_x = '-85.491302';
		$location_y = '38.36621792373851';

		$theta = $location_x - $x;
		$distance =
			sin(deg2rad($location_y)) * sin(deg2rad($y)) +
			cos(deg2rad($location_y)) *
				cos(deg2rad($y)) *
				cos(deg2rad($theta));

		$distance = round(rad2deg(acos($distance)) * 60 * 1.1515);

		if ($distance > 25) {
			unset($rates['flat_rate:4']);
		}

		if ($distance > 100) {
			unset($rates['local_pickup:5']);
		}

		return $rates;
	},
	10,
	2,
);