Description:
------------
---
From manual page: http://www.php.net/language.oop5.magic
---

The inbuilt conversion of objects to Boolean, especially for expression evaluation, is poor and could be greatly improved.

I propose one of two mechanisms:

(a) Given the existing __toString() magic method, use this as an intermediate step in the conversion to a bool value, following the documented rules for string.

or 
(b) add support for an explicit __toBoolean magic method, which allows the implentation to take full control over the resulting type.

Thank you

Test script:
---------------
class NullObject {
  public function __toString() { return ""; }
  public function __toBoolean() { return false; }
  public function __call($name , $arguments) { return $this; }
}

$test = new NullObject();
echo $test ? "TRUE" : "FALSE" ;

// TRUE, but logically expect FALSE