Someone added a performance test at some point, older solutions didn't have to pass that test. It's still possible to pass in PHP, you just need a faster solution.

I had the same issue in PHP. In the end, I copied the best solutions offered here and they all fail the speed test. :)))))

Your solution being too slow is not a kata issue.

I just solved the kata in PHP and had no issues related to timeout. I think you need more than two lines.