Question

Possible Duplicate:
Initializing Class Fields at the Field Definition or in Class Contructor
Setting variables on Constructor VS on the class definition

What is the difference (if any) between the following 2 examples, and what is the proper way to initialize object properties?
Please note that the content of $fields in this case is something predefined, it will not change in runtime.

Example 1:

class User
{
    $fields = array('username', 'password', 'email');

    function __construct()
    {
    }    
}

Example 2:

class User {
    $fields;

     function __construct()
     {
         $this->fields = array('username', 'password', 'email');
     }     
}

Answer 1

The first example… It is more explicit and obvious to the reader what the intention of $fields is… “something predefined“