Conditionally Center Google Maps field for Advanced Custom Fields

If you want to center the Google Maps field from Advanced Custom Fields based on conditions, you can easily do it with a filter acf/load_field. Let us see how.

If you have used the Google Maps field from Advanced Custom fields, you may already know that it centers at Melbourne, Australia. You can change lat and lng values to change this.

In a recent project, I needed to display the Google Maps field according to the user’s current location. The project consists of three countries and users will mostly select locations from those three countries. So, what we need is to default (center) the Google Maps field at those countries when the field is shown.

The Code Snippet

<?php
function acf_google_map_load_field( $field ) {
    if ( ef_event_country() == 'us' ) {
        $field['center_lat'] = '40.712776' ;
        $field['center_lng'] = '-74.005974';
    } elseif ( ef_event_country() == 'aus' ) {
        $field['center_lat'] = '-37.81411' ;
        $field['center_lng'] = '144.96328';
    } elseif ( ef_event_country() == 'nz' ) {
        $field['center_lat'] = '-36.848461' ;
        $field['center_lng'] = '174.763336';
    } else {
        // Default to US if country not set
        $field['center_lat'] = '40.712776' ;
        $field['center_lng'] = '-74.005974';
    }
    return $field;
}

add_filter('acf/load_field/name=event_address', 'acf_google_map_load_field');Code language: PHP (php)

Here I already had a function ef_event_country that returns the user’s country. We simply assigned values to the field’s center_lat and center_lng with our own latitude and longitude values.

That ensured our users see their country when the Google Maps field is loaded 👌