CakePHP $_GET/$_POSTの値はどこに？

CakePHP $_GET/$_POSTの値はどこに？ | Shin x blog

// 以下3つは同じ
// $this->params['form']['data']['Foo']['name'] => 'Bar'
// $this->params['data']['Foo']['name'] => 'Bar'
// $this->data['Foo']['name'] => 'Bar'