getenv method doesn't work in laravel config:cache

[rezvani]

To optimize performance in laravel we should use this command:
php artisan config:cache

This command will be produce config file in cache and then application cannot access to .env variables.
So getenv method in Util class will be return null instead of actual value in ENV

How to reproduce
For example in when i need to use proxy in all of requests in laravel packages (such as Telegram Notification) i set HTTPS_PROXY variable in .env. and as usual i will be run php artisan optimize command to cache all files and config for better performance.
in this situation, guzzle never use proxy, because Utils::getenv('HTTPS_PROXY') return null.

Possible Solution
We can use function_exists method for config function to read from that.

    if (function_exists('config')){
        return config($name);
    }

    if (\PHP_SAPI === 'cli' && ($value = \getenv($name)) !== false && $value !== null) {
        return (string) $value;
    }

    return null;
}

[Graham Campbell]

Thanks for getting in touch. One should set this as config when constructing the Guzzle client, passing it through explicitly in the constructor. Using global variables for configuration is an anti-practice that exists only for legacy BC.