License question

Hey! I am not very good with English - its my second language, German my first - so I wanted to ask about something that has to do with redistribution. Currently, in my project I am configuring PHP and then compiling it, plus a few extensions (v8js, yar, uv, pthreads, PHP-CPP) to a set of static libraries (libphp5.a, libtsrm.a, libzend.a, libphp-v8js.a, …). In the end process, this is all combined, together with other libraries, into a dynamic library. This project is not public yet, since I dont know if: - I can actually link PHP into my dynamic library without tripping on any licensing? - That applies to all extensions using the PHP license? - I have to redistribute anything else but the headers? (of course, a copyright notice to php plus original headers of the main library and extension swould be distributed all together, excluded would be the actual binaries/utilities, phar, php, php-cgi, etc.) Would be great to know if I can work it that way or not! :) Because the least I want is to run against a wall… o.o Kind regards, Ingwie.