Description:
------------
Will good if programmer can overload "=" asssing operator.

For example

class test {

   protected $var;

   function __assign($v) {
      $this->var = $v;
   }

   function __construct($v) {
      $this->var = $v;
   }
}

$a = new test(321); // 321
$a = 123; // 123