I've noticed that LiveJournal uses its own form of URL handling in Perl, by the use of the PerlRequire directive. What I presume that it does, is pass the URL to the specified script, allows processing for special cases (i.e. /users/, /community/, etc) but then passes the URL back to Apache for all unhandled URLs.
Does PHP allow this kind of processing?
Can I combine Perl and PHP in this manner?