If I run the latest version of the script tracker php on my server, it returns "No results available" if I am running the latest release of PHP 7.1.3. If I downgrade to PHP 7.1.2, it works fine. I don't have time to troubleshoot at the moment, but will try to take a look soon.
Not sure to be honest. Are you getting any sort of error in the PHP log? Looking at the 7.1.3 changelog, I don't see anything there would affect it.
Hmm, I went back to test some more, and now I can't get it to fail. Earlier today I was having the issue, so I reverted to 7.1.2 and immediately was successful in checking results. (I was also loading the script directly in the browser, to see the JSON it returns.) When I had an issue, there were no errors logged, just a JSON result showing no SERPs. Now it seems to work fine with both PHP 7.1.2 or 7.1.3. Probably just coincidence that it began acting up right after I had upgraded. Maybe it was a Google API capacity issue. Thanks.