Introduction
Yaf_Route_Regex is the most flexible route among
the Yaf built-in routes: it matches the request URI against a regular
expression. When the pattern matches, the default module, controller and
action are used, and the captured subpatterns are assigned to request
parameters through a numeric map.
It is similar to Yaf_Route_Rewrite, but instead
of a human-friendly pattern it takes a full PCRE pattern, which makes
it able to express matching rules that the other built-in routes
cannot.