Not sure. Localhost is a "loopback" whereas "testzone" isn't. Not sure how you'd configure that.

But why would you need 2 XAMMP servers? Different settings and configurations? Otherwise, just put your website bits into different sub-folders in HTDOCS.

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Programmers are in a race with the Universe to create bigger and better idiot-proof programs, while the Universe is trying to create bigger and better idiots. So far the Universe is winning. - Rich Cook