Hey @cs278 ,

Yeah, we could have used `5.3` in there. As I commented on the commit message of 2861ac6, I just *felt* that putting `5.5` there seemed faster while running the tests. Also, it makes it more readable to put `5.5` since the bugfix is for PHP 5.5.

In ALL cases, this PR should be closed, because even if the code is forked with an `if` condition, it breaks for PHP 5.2 with E_PARSE error.