If you've written a webapp and you want to ensure that critical parts such as the signup process stay working, the best would be to have an actual user go through that process every time you change your codebase. But...
PHP's strrev is not safe to use on utf-8 strings because it reverses a string one byte at a time. So if a character consists of multiple bytes it cannot be preserved as an entity in the reversed result.
If something weird is happening, you want to know everything that's going on on a server, as fast as possible.
This article aims to provide a compact tutorial for setting up an Octopress blog from scratch on OSX.