Can't add anything to flynt's functions.php (flynt 2.1.1)

[Iain-g]

I've tried adding things to the flynt functions.php file, such as the ACF pro google maps api code which they supply, but get a fatal error:
Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "my_acf_google_map_api" not found or invalid function name - I've tried adding other things as well with same result - do I need to do this differently? ACF code I added is
function my_acf_google_map_api( $api ){ $api['key'] = 'xxx'; return $api; } add_filter('acf/fields/google_map/api', 'my_acf_google_map_api');

I added this to the end of the flynt functions.php with no other edits.

[timohubois]

@Iain-g in Flynt, namespaces are used and it looks like your functions.php file is missing one at the filter part. Based on your example, this should work:

function my_acf_google_map_api($api)
{
    $api['key'] = 'xxx';
    return $api;
};
add_filter('acf/fields/google_map/api', __NAMESPACE__ . '\my_acf_google_map_api');

Alternatively, you can use an anonymous function like this:

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

[Iain-g]

@timohubois thank you, working fine now with your first suggestion