Why cant everyone adapt to the coding guidelines?

[eluser]Eric Barnes[/eluser]
I also think Pear and Zend recommend using camel case in their guides.

Class variables (a.k.a properties) and methods should be named using the "studly caps" style (also referred to as "bumpy case" or "camel caps"). Some examples (these would be "public" members):

So that may be part of the reason some people do it one way. But I tend to agree it is whatever you are used to. Just try and keep them standard in your own code.