Google Cloud API - Application Default Credentials

Question

I have the following code, modified from Google\'s documentation:

        $GOOGLE_APPLICATION_CREDENTIALS = \"./[path].json\";
        $_ENV[\"GOOGLE_APPLICATION         


        

Answer 1

You need to use putenv() (http://php.net/manual/en/function.putenv.php) instead of trying to use any of the methods you have used ($_ENV or $_SERVER).

Taken from https://github.com/google/google-api-php-client/blob/master/UPGRADING.md#google_auth_assertioncredentials-has-been-removed

// OR use environment variables (recommended)

putenv('GOOGLE_APPLICATION_CREDENTIALS=/path/to/service-account.json');
$client->useApplicationDefaultCredentials();