how to pro at PHP ?

[hirikarate]

My teacher said that there are many things about PHP to learn, but basically there are: htaccess, SEO, OPP, smoody template, ...
Can you tell me there is anything else, and if I want to be a PHP professional programmer, what do I have to learn?
Thanks

[iblastoff]

you are confused. what does php have to do with SEO??? or htaccess even?