Description:
------------
The ZEND_CHANGES defines that __toString method whould 
be called whenever object is casted to sting. But actually it is 
casted to string only during print (echo) operator. 
Even the example in ZEND_CHANGES does not work: 
            class Foo { 
                function __toString() { 
                    return "What ever"; 
            } 
            $obj = Foo; 
            $str = (string) $obj; // call __toString() 
            echo $obj; // call __toString() 
 
print $str will print the "Object" sring, not the "What ever". 
 
One more code example: 
class Integer { 
    private $value; 
 
    function __construct($val) { 
        $this->value = $val; 
    } 
 
    function __toString() { 
        return (string)($this->value); 
    } 
} 
 
$i = new Integer(10); 
if (10 == $i) 
    echo '10!!!! :-)'; 
 
"10!!! :-)" is not printed. 
 

Expected result:
----------------
When object is accessed in expressions it should be explicitly 
casted to sting nor vartype.