`str_replace()` with more search then replace values

even if it is supported by php-src, I think it should be an error (or at least warning) when using str_replace with less replace args, then search args. its most likely a typo and the default behaviour of php-src assuming we want to replace with an empty string is not obvious.

I expect an error, telling me that the number of replace args is not equal with the number of search args in https://psalm.dev/r/7385fe7881