The single most useful thing about PHP code is that if I don't quite understand a function I see I can look it up by using a browser and typing:
http://php.net/function
Last month I saw the "range" function in some code. It's one of the hundreds of functions I'd managed to never use but turn out to be really useful:
http://php.net/range
That url is an alias for http://us2.php.net/manual/en/function.range.php. That simple idea, of mapping functions and keywords to urls, is awesome.
I wish other languages, frameworks, databases, operating systems has as simple a mechanism for looking up documentation.
