This is a phpweb feature request for the following.  Here's an example:

  php.net/ini/register-globals

Which would redirect to an appropriate ini entry which would be:

  configuration.directives.php#ini.register-globals

The idea is every documented php directive would redirect as such.  One consideration is how all ini directives are currently scattered about in the manual (per module/subject) so I don't believe this is a simple one line redirect.  

This is related to phpdoc discussions about a page that lists all ini directives which might either link to the appropriate directive entries (index) or this page might include the definitions.  Point is, this is a related feature request.  Maybe php.net/ini will list them all.