Exotic names for methods, constants, variables and fields - Bug or Feature?

Question

after some confusion in the comments to

• Is it safe to have 1 letter class names in PHP, e.g A, B, C

I thought I make into a question. According

Answer 1

Your character is encoded as 0x80 0x90 0xe2 or something like that, thus it matches your regexp when not interpreting the unicode (working on single bytes).