Wordpress filter - Geocode postal code custom field to latitude and longitude custom fields - Gravity forms, regular custom fields

wp-geocode-postalcode-gravityforms.php

<?php

	/**
	 * Geocodes a postal code field from a gravity form, saves latitude and longitude to custom fields
	 * To use this, change $entry[26] to the id of your gravity form field that contains the postal code - i.e. $entry[2]
	 * To use this, change the name of the geo_latitude and geo_longitude custom fields to what you've created.
	 * For bonus points, name your lat and long custom fields geo_latitude and geo_longitude, to be in line with Wordpress standard Geodata: https://codex.wordpress.org/Geodata
	 *
	 *
	 */

	// Geocode an address on saving a gravity form
	add_action('gform_after_submission', 'geocode_address_gravity_forms', 10, 2);

	function geocode_address_gravity_forms($entry,$form) {
		if(isset($entry[26]) && !empty($entry[26]))
		{

		    // Form the url to geocode the postal code
		    $resp = wp_remote_get( "http://maps.googleapis.com/maps/api/geocode/json?address=".urlencode($entry[26])."&sensor=false" );
		    if( is_wp_error( $resp ) ) {

		    	// If there is an error reaching googleapis, populate the custom field with an error messageom field
		    	$geocode_error = 'Error geocoding address';
		    	update_post_meta($entry['post_id'], 'geo_latitude', $geocode_error);
		    	update_post_meta($entry['post_id'], 'geo_longitude', $geocode_error);

		    } elseif ( 200 == $resp['response']['code'] ) {
		        $body = $resp['body'];
		        $data = json_decode($body);
		        if($data->status=="OK"){

		            // If the geocoding was successful, parse the json to get the lat and long
		            $latitude = $data->results[0]->geometry->location->lat;
		            $longitude = $data->results[0]->geometry->location->lng;

		            // Set the post custom fields
		            update_post_meta($entry['post_id'], 'geo_latitude', $latitude);
		            update_post_meta($entry['post_id'], 'geo_longitude', $longitude);

		        }
		    }
		}
	}


	// 
    /*
     * Another example that will geocode a postal code custom field and save the latitude and longitude as custom fields 
	 * To use this, change $custom_fields["postal_code"] to the id of your gravity form field that contains the postal code - i.e. $custom_fields["my_postal_code"]
	 * To use this, change the name of the geo_latitude and geo_longitude custom fields to what you've created.
	 * For bonus points, name your lat and long custom fields geo_latitude and geo_longitude, to be in line with Wordpress standard Geodata: https://codex.wordpress.org/Geodata
	 *
	 *
	 */
	 
	//add_action('save_post', 'geocode_address', 10, 2);

	function geocode_address($post_id) {
		$custom_fields = get_post_meta($post_id);
		if(isset($custom_fields["postal_code"]) && !empty($custom_fields["postal_code"][0]))
		{
		    $resp = wp_remote_get( "http://maps.googleapis.com/maps/api/geocode/json?address=".urlencode($custom_fields["postal_code"][0])."&sensor=false" );
		    if( is_wp_error( $resp ) ) {

		    	// If there is an error reaching googleapis, populate the custom field with an error messageom field
		    	$geocode_error = 'Error geocoding address';
		    	update_post_meta($post_id, 'geo_latitude', $geocode_error);
		    	update_post_meta($post_id, 'geo_longitude', $geocode_error);

		    } elseif ( 200 == $resp['response']['code'] ) {
		        $body = $resp['body'];
		        $data = json_decode($body);
		        if($data->status=="OK"){

		        	// If the geocoding was successful, parse the json to get the lat and long
		        	$latitude = $data->results[0]->geometry->location->lat;
		        	$longitude = $data->results[0]->geometry->location->lng;

		        	// Set the post custom fields
		        	update_post_meta($post_id, 'geo_latitude', $latitude);
		        	update_post_meta($post_id, 'geo_longitude', $longitude);

		        }
		    }
		}
	}