Geocode Custom Fields

geocode.php

add_action( 'save_post', 'dkk_save_latlong' );

function dkk_save_latlong( $post_id ) {
	// verify if this is an auto save routine. 
	// If it is our form has not been submitted, so we dont want to do anything
	if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) 
		return;
  
	// Check if it is our custom post type
	if ( 'community-guide' == $_POST['post_type'] ) {
		// Check Permissions
		if ( !current_user_can( 'edit_post', $post_id ) ) {
			return;
		}
		
		$street = $_POST['_dkk_address'];
		$city_st_zip = $_POST['_dkk_city_state'];
		$address = $street .', '. $city_st_zip;
		
		// Send Address to Google to Geocode it
		$response = json_decode(file_get_contents('http://maps.googleapis.com/maps/api/geocode/json?address=' . urlencode($address) . '&sensor=false', false, null, null));
	
		$latitude = $response->results[0]->geometry->location->lat;
		$longitude = $response->results[0]->geometry->location->lng;
		
		// Update the Custom Field
		update_post_meta($post_id, 'location_latitude', $latitude);
		update_post_meta($post_id, 'location_longitude', $longitude);
		
	} else {
		return;
	}
}