Expression is not allowed as field default value

Question

I am trying to make $app available for the whole class.

First, I get:

"Expression is not allowed as field default value"

Second, on line 5, I get:

Unidentified variable $app

How can I achieve my goal?

class UserController extends XController {     var $app = Yii::app();;     public function init()     {         $test = $app; 

Answer 1

You can not call a method to set a default value for a variable in PHP, not even if it is a static method. Change it to be set in the constructor:

use Yii;  class UserController extends XController     {     var $app;      function __construct() {         $this->app = Yii::app();     }      public function init()         {         $test = $this->app;     }  } 

As a side note, you should not use the var keyword in PHP versions > 4, see this question for an explanation.