get site url in cakephp

Hi , how to get site url in controller and view.The same built in
function available in CI.My objective is to get "localhost/
project_name" in development mode and "domainname.com" in production
in both view and controller. Is it possible in Cake.
I can write like this.

$data = explode('/',$_SERVER['REQUEST_URI']);
echo $_SERVER['SERVER_NAME']."/".$data['1'];
But i think this is not a better way..

Thanx in advance.

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