Ternary operator syntax error in class declaration

I want to use ternary operator to assign two different values to the class variable.

I have following code sample where i am getting fatal error.

    class test {
         public $data = (true) ? "working" : "not working"; //Parse error: syntax error, unexpected '(' in C:\xampp\htdocs\Faltu\test.php on line 15

         function __construct() {
            echo $this->data;
         }  
    }
    $test = new test(); 

I have tried without class and it's working fine but in class I'm getting error.

Can anyone guide me how to achieve this?

You may only assign constant values when declaring properties, you cannot perform logical operations, like a ternary.

You can perform your logic in your __construct function:

class test {
     public $data = NULL;

     function __construct() {
        $this -> data = true ? "working" : "not working";
        echo $this -> data; // working
     }  
}
$test = new test();

From the documentation:

This declaration may include an initialization, but this initialization must be a constant value--that is, it must be able to be evaluated at compile time and must not depend on run-time information in order to be evaluated.