note 3232 deleted from language.variables.predefined by jimw

There's one more HTTP daemon generated variable, which is very useful in PHP3 environment. It's PATH_INFO, which simply contains the path following script in the URI. For example, if your scripts' URI is /stuff/script.php3, and you call it as /stuff/script.php3/argument, you will get /argument passed via $PATH_INFO variable. This is very useful for controlling caching of the documents retiurned, since most w3cache don't store URIs which contain characters used to pass arguments (?,& etc)