Request fails in Sandbox, but succeeds in Production

[WatsonDev]

I have a PHP script that was working in the Sandbox and I took some time off, and now when I run my code it fails.

What is strange is that the exact same code works in both Test and Live in my Production account.

I checked my API Login ID and created a new Transaction Key in my Sandbox account, but it still fails.

For the sandbox I am using (minus spaces):  https:// apitest . authorize . net/xml/v1/request.api

In the sandbox, I am getting a properly formed Request XML String and a properly formed Request Object, but for the Response XML String I just get:  boolean false

What could be causing this issue?

[RichardH]

Hello @WatsonDev

We recently update our sandbox to require a TLS 1.2 connection in preparation for a similar change in production in September.  You can read more at the URL below:

https://community.developer.authorize.net/t5/News-and-Announcements/Sandbox-Connection-Issues-TLS-1-...

Richard

[WatsonDev]

So if I don't have OpenSSL v1.0.1 then my code will fail in the Sandbox?