Where do I find (in the Codex pages) a reference guide to all the WP PHP functions and their variables ?
(Blooging-wise I'm relatively sophisticated, been doing it for 7 years, but PHP-wise I know wenough to be dangerous, however ... trying-out new widgets and plug-ins, I invariably break things that are in the php functions that are part of my selected - and customised - theme. I need to reverse engineer which functions do what ... in the theme and in the WP functions ... before making changes.
Observation - using the WP UI to select themes, widgets and plug-ins is fine of you are starting new - but it blows away anythng more sophisticated you already had. Lesson learned.
Anyway simple question - where is the WP PHP Reference ?