actually i solved the kata initially i didnt get what this kata wants
"You need to find all number that doesnt contain 5 in them in a given range and return the total of such number"
like 54 has 5 in it, we should not count it and also range can contain -ve number so watch that out

Your function is not returning, it's your code that's wrong, not the site.
I've just tested php version and it works fine, fix your code.

testExamples
Log
8
Failed asserting that null matches expected 8.
Completed in 0.36ms
testFixed
Log
72
Failed asserting that null matches expected 72.
Completed in 0.21ms
testRandom
Log
20
i am getting this
i think i am correct but the codewars site is not accepting my answer
this site is trash

same here man