So basically new php versions are broken, they no longer show up except the Uwamp php mirror, BUT that is not updated and seriously needs a refresh.
I have tried looking for a config file to show where the url's for the fetch of information but i can't find it any where, i suppose it's baked in to the uwamp.exe file which i can't edit. any ways, just wanted to reach out and tell you that and hope for a update soon.
*Note:
This website got all extensions (most of them anyways included) in their version, maybe able to add their repo as "extended". That would be a very cool and a nifty feature, it does work, i have been running it for some time now.