apache_lookup_uri
This function is a wrapper for Apache's table_get and table_set.
It
edits the table of notes that exists during a request. The
table's
purpose is to allow Apache modules to communicate. Here are
some
further details I found in the mailing list
archives:
Rasmus wrote:
The main use for
apache_note() is to pass information
from one module to another within
the same request. I haven`t seen an
actual implementation that uses
this yet, but it is quite possible for
someone to write a module which
performs some sort of action at one of the
other stages of the request
and stores some information in the Apache note
table which will then be
available to PHP when the request reaches the
content-handling stage.
Or, one could have a logging module that reads
something from the
Apache Note table set by PHP.
David Sklar wrote:
You can
use it to facilitate communication between modules that act on
the
request at different stages. I use it to record userids in
logfiles. In
some PHP that gets auto_prepend-ed, I do
a
apache_note(`sessionID`,$sessionID);
(where
$sessionID has been slurped out of a cookie and processed)
and
then, in my httpd.conf, part of my LogFormat
is
"%{sessionID}n"
so that sessionID gets
written to the logfile.
If you have other modules that process
the request before or after PHP
does (authentication, fixups,
whatever..) you can have them talk to PHP or
PHP talk to them through
the notes table.
