PHP 5 Objects, Patterns, and Practice has a lot of advanced stuff. http://www.amazon.com/PHP-5-Objects-Patterns-Practice/dp/159...

Zend PHP Study Guide has the basics without much examples. http://www.amazon.com/architects-Zend-Certification-Study-Gu...

I have occasionally used php over the years, but not lately. Soon I will probably have to take up project with it again. So I wanted to go trough a book or two. But everything I found have rather bad coding style, just the one for what php if famous for. What would be good source to learn more advanced features and good practices of producing quality php code?

I don't (and won't) use PHP, but I'd suggest starting with an O'Reilly book like http://www.oreilly.com/catalog/progphp2/