What is a good book for learning PHP and MySQL?

I’m a programmer who knows a number of mainframe languages and DB2 SQL quite well. I’m comfortable finding my way around a Unix system—though the case sensitivity irks me sometimes. I even know a fair amount of Javascript. But I know zilch about Apache, PHP, or MySQL. So I don’t want a book that’ll talk down to me like I’m a “dummy” or rank beginner. I’ve always liked the O’Reilly books, though they’re a tad expensive.