Can I run reCAPTCHA on my localhost Apache server in this Laravel application?

I am pretty new in PHP and Laravel and I have the following problem: into my Laravel application I have to implement a page containing a form that have to contain a Google reCAPTCHA field. The submitted form will be validated if the reCAPTCHA field is correctly compiled. I have no previous experience with reCAPTCHA.

I have found this tutorial:

http://ift.tt/1TLKzDY

In this tutorial it says that:

I will first visit Google reCaptcha site http://ift.tt/zf6qu2 and register new site there. Good thing is that you can insert multiple domains, so same captcha placement can work on your development domain and production domain.

So it says that I have to register my domain here:

http://ift.tt/1t6P0vw

Why? Because in this way the reCAPTCHA service can send the captcha text to my website? Or what?

My problem is that at this time my Laravel web site is running on my local development laptop (on my XAMPP localhost Apache server).

Can I test it on my localhost server in some way or is it impossible to do and I have to deploy it on my remote server using the associated domain?

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