fetch-and-save-google-maps-data-in-acf.php

<?php
// Add your Google Maps API key, preferrably in wp-config.php or in the database.
define( 'GOOGLE_MAPS_API_KEY', '' );

function acf_google_map_api( $api ) {
	$api['key'] = GOOGLE_MAPS_API_KEY;
	return $api;
}
add_filter( 'acf/fields/google_map/api', 'acf_google_map_api' );

function fetch_and_save_google_map_data( $post_id ) {
	if ( defined( 'DOING_AUTOSAVE' ) ) return;
	if ( ! isset( $_POST['post_type'] ) || $_POST['post_type'] !== 'post' ) return;

	$city = '';
	$address = '';

	// Checking the POST request for the address and city, change these field keys.
	if ( ! empty( $_POST['acf']['field_67ea988ce2fbb'] ) ) {
		$city = $_POST['acf']['field_67ea988ce2fbb'];
	}

	if ( ! empty( $_POST['acf']['field_67ea9878e2fba'] ) ) {
		$address = $_POST['acf']['field_67ea9878e2fba'];
	}

	if ( $city && $address ) {
		$full_address = urlencode( $address . ', ' . $city . ', Netherlands' ); // Hardcoded The Netherlands, could be a field as well.
		$api_url = 'https://maps.googleapis.com/maps/api/geocode/json?address=' . $full_address . '&key=' . GOOGLE_MAPS_API_KEY;

		$response = wp_remote_get( $api_url );

    if ( is_wp_error( $response ) ) return;

		$body = wp_remote_retrieve_body( $response );
		$data = json_decode( $body );

		if ( empty( $data->results ) ) return;

		$result = $data->results[0];
		$location = $result->geometry->location;
		$latitude = $location->lat;
		$longitude = $location->lng;
		$components = $result->address_components;

		$address_data = array(
			'street_number'  => '',
			'street_name'    => '',
			'city'           => '',
			'state'          => '',
			'state_short'    => '',
			'post_code'      => '',
			'country'        => '',
			'country_short'  => ''
		);

		foreach ( $components as $component ) {
			if ( in_array( 'street_number', $component->types ) ) {
				$address_data['street_number'] = $component->long_name;
			}
			if ( in_array( 'route', $component->types ) ) {
				$address_data['street_name'] = $component->long_name;
			}
			if ( in_array('locality', $component->types ) ) {
				$address_data['city'] = $component->long_name;
			}
			if ( in_array('administrative_area_level_1', $component->types ) ) {
				$address_data['state'] = $component->long_name;
				$address_data['state_short'] = $component->short_name;
			}
			if ( in_array('postal_code', $component->types ) ) {
				$address_data['post_code'] = $component->long_name;
			}
			if ( in_array('country', $component->types ) ) {
				$address_data['country'] = $component->long_name;
				$address_data['country_short'] = $component->short_name;
			}
		}

		$google_map_data = array(
			'address'       => $result->formatted_address,
			'lat'           => $latitude,
			'lng'           => $longitude,
			'zoom'          => 14, // This is the default zoom level.
			'place_id'      => $result->place_id ?? '',
			'name'          => $address_data['street_name'] . ' ' . $address_data['street_number'],
			'street_number' => $address_data['street_number'],
			'street_name'   => $address_data['street_name'],
			'city'          => $address_data['city'],
			'state'         => $address_data['state'],
			'state_short'   => $address_data['state_short'],
			'post_code'     => $address_data['post_code'],
			'country'       => $address_data['country'],
			'country_short' => $address_data['country_short']
		);

		update_field( 'location', $google_map_data, $post_id ); // Finally, update the 'location' field name if needed.
	}
}
add_action( 'save_post', 'fetch_and_save_google_map_data' );