O Guia Definitivo do Yii 1.1

array(
'//' => '/
',
'/' => '/read',
's' => '/list',
)
In the above, we use two named parameters in the route part of the rules: _c and _a. The
former matches a controller ID to be either post or comment, while the latter matches an
action ID to be create, update or delete. You may name the parameters differently as long
as they do not conflict with GET parameters that may appear in URLs.
Using the aboving rules, the URL /index.php/post/123/create would be parsed as the route
post/create with GET parameter id=123. And given the route comment/list and GET
parameter page=2, we can create a URL /index.php/comments?page=2.
Parameterizing Hostnames
Starting from version 1.0.11, it is also possible to include hostname into the rules for
parsing and creating URLs. One may extract part of the hostname to be a GET parameter.
For example, the URL http://admin.example.com/en/profile may be parsed into GET
parameters user=admin and lang=en. On the other hand, rules with hostname may also
be used to create URLs with paratermized hostnames.
In order to use parameterized hostnames, simply declare URL rules with host info, e.g.:
array(
)
'http://.example.com//profile' => 'user/profile',
The above example says that the first segment in the hostname should be treated as user
parameter while the first segment in the path info should be lang parameter. The rule
corresponds to the user/profile route.
Note that CUrlManager::showScriptName will not take effect when a URL is being created
using a rule with parameterized hostname.
Also note that the rule with parameterized hostname should NOT contain the sub-folder if
the application is under a sub-folder of the Web root. For example, if the application is
under http://www.example.com/sandbox/blog, then we should still use the same URL rule
as described above without the sub-folder sandbox/blog.
Hiding index.php
There is one more thing that we can do to further clean our URLs, i.e., hiding the entry
script index.php in the URL. This requires us to configure the Web server as well as the
urlManager application component.