John Cox has posted this new item on his blog today with a pointer to this "periodic table of variables and arrays".

From DeformedWeb.co.uk comes a periodic table of variables and arrays. It looks to be quite useful as it is generated on pageview:

"In case interested all these tests are carried out live as this page is rendered (with a bit of 'eval'), so any upgrade of PHP will immediately show up. If you have a different version of PHP, and would like to host a copy then let me know at the link below."

It's a pretty cool setup, throwing tons of data at you all at once - but it's very handy information. Find the row for the function you're calling, then cross-reference with the column of the content type, and you get the return value - it's that easy...now if he'd just share the source...