Simple, to the point, and compact; exactly what you'd expect from an O'Reily Pocket Reference, with one exception...

It's missing the name of the function groups ("Array Functions", "MySQL Functions", "PDF Functions" etc.) in the top outermost corner of all the pages. Makes flipping through for a specific function just that much slower.

Note to Editors for Ver. 2; if your going to add the quick flip titles, please put the actual function name at the top of the page next to its grouping (i.e. "pdf_set_transaction - PDF Functions")