These are questions, often times with answers, for the PHP Internals. This document is temporary until it's polished and finds a home within the PHP Manual sources. Feel free to add questions with or without answers.

Note: This is rough, feel free to clean it up.

09:20:43 <johannes_> and ext/extname/php_extname.hhas to be a valid C header, not C++, as it's included in internal_functions.c ...
09:22:06 <dsp_> hmm, that's the point..
09:23:01 <johannes_> you can have your own additiona header for C++ suff, but that one has to be C compatible