Sure! Below is an example of how to implement a simple CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) in Laravel 7 using the popular package `greggilbert/recaptcha`.

Step 1: Install the required package

In your Laravel 7 project, open a terminal and run the following command to install the `greggilbert/recaptcha` package:

```bash

composer require greggilbert/recaptcha

```

Step 2: Get the reCAPTCHA API keys

Go to the reCAPTCHA website (https://www.google.com/recaptcha) and sign up or log in to your Google account. After that, register your website to get the site and secret keys required for reCAPTCHA integration.

Step 3: Configuration

Open the `.env` file in your Laravel project and add the following lines:

```dotenv

RECAPTCHA_SITE_KEY=your-recaptcha-site-key

RECAPTCHA_SECRET_KEY=your-recaptcha-secret-key

```

Step 4: Create a form with CAPTCHA

Now, let's create a simple form with a CAPTCHA field. For this example, let's assume we want to protect the login page.

In your view file, e.g., `resources/views/auth/login.blade.php`, add the following code:

```html

Login

```

Step 5: Validate the CAPTCHA

Now, in your `LoginController`, which should be located at `app/Http/Controllers/Auth/LoginController.php`, add the necessary validation for the CAPTCHA.

```php

namespace App\Http\Controllers\Auth;

use App\Http\Controllers\Controller;

use Illuminate\Foundation\Auth\AuthenticatesUsers;

use Illuminate\Http\Request;

use Validator;

use Auth;

class LoginController extends Controller

{

use AuthenticatesUsers;

protected $redirectTo = '/home';

public function __construct()

{

$this->middleware('guest')->except('logout');

}

protected function validator(array $data)

{

return Validator::make($data, [

'email' => ['required', 'string', 'email', 'max:255'],

'password' => ['required', 'string', 'min:8'],

'g-recaptcha-response' => ['required', 'recaptcha'],

]);

}

protected function credentials(Request $request)

{

return array_merge($request->only($this->username(), 'password'), [

'active' => 1, // Add any additional login conditions if required

]);

}

}

```

Step 6: Routes

Ensure that the `web` middleware group is applied to the login routes in `routes/web.php`.

```php

Route::get('login', 'Auth\LoginController@showLoginForm')->name('login');

Route::post('login', 'Auth\LoginController@login');

```

That's it! Now, your Laravel 7 application should have a simple CAPTCHA implemented on the login page. The user will need to solve the CAPTCHA to log in successfully.