In a PHP application, what steps can be taken to prevent exceeding daily limits for authentication requests and ensure smooth operation of Google Login functionality?

To prevent exceeding daily limits for authentication requests when using Google Login functionality in a PHP application, you can implement caching of authentication tokens to reduce the number of requests made to Google's servers. This can help ensure smooth operation of the login functionality without hitting daily limits.

// Check if the authentication token is cached
$token = get_cached_token();

if (!$token) {
    // Perform authentication request to Google and retrieve token
    $token = authenticate_with_google();

    // Cache the authentication token
    cache_token($token);
}

// Use the authentication token for subsequent requests
use_authentication_token($token);