Heh, thankfully I don't have to support PHP versions that old (although PHP 5.2 might as well be). It's called Requests for PHP to disambiguate it from Kenneth Reitz's fantastic Requests library in Python, which also serves to inspire my library.
Consider yourself lucky, A year and a half ago I was supporting PHP 5.1.
I wasn't confused by the title on the linked-to page, separating the version number from the name helped.
I thought it was a list of people requesting a PHP 1.6 binary to test for their outdated servers. Like, very cheap webhosts or something.