authentication - Best way to display current logged-on user in default.ctp? -

I am in the process of customizing the file

default.ctp and I try to display it I'm currently logged on to the user's name at the top of the page. In

app_controller.php , I have the following:

  beforeFilter () function {$ User = $ this- & gt; Authorization-> the user (); If ($ user! = Null) {$ this-> Session-> Type ('user_name', $ user ['user'] ['username']); }}  

and in default.ctp , I have:

  $ user = $ this-> Session-> gt; Read ('Auth.User'); If (! Blank ($ user)) {echo 'hello,' $ user ['user_name']; }  

However, it seems that the value $ user_name is not being set anywhere.

What am I doing wrong? Is this a better way to accomplish this?

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Update: I have modified it as described in the answer, but it still does not work. I get an error:

undefined index: user_name [APP / view / layout / default.button, line21]

< Div class = "post-text" itemprop = "text">

You can use session allper directly in view / layout

  $ user = $ this- & gt; Session-> Read ('Auth.User'); If (! Blank ($ user)) {echo 'hi', $ user ['user_name']; }