There are no tutorials for that. It's called learning and experience. If you don't know any PHP then start off with the basics of which there are countless tutorials out there for as well as good books. Then start building websites. The more experience you have the better you will become at it.

I would recommend Pixel2Life if you are looking for some PHP tutorials. They have a wide selection of tutorials to choose from. Here you go if your interested.

http://www.pixel2life.com/tutorials/php_coding/

Also check out http://www.goodphptutorials.com

I would recommend http://www.hudzilla.org/phpbook/ or the more recent version (which I only just discovered while getting the link) http://hudzilla.org/phpwiki/index.php?title=Main_Page