Description:
------------
The logical operators 'and', 'or', 'xor' have unexpected
results. The bug doesn't occur when using C-style logical
operators ( ||, &&, ^^).

From the php manual (Logical Operators Section):
http://www.php.net/manual/en/language.operators.logical.php

Example   | Name | Result
--------------------------------------------------
$a and $b | And  | TRUE if both $a and $b are TRUE.
$a or $b  | Or	 | TRUE if either $a or $b is TRUE.
$a xor $b | Xor	 | TRUE if either $a or $b is TRUE, but not both.


This bug is reproducible on the latest stable snapshot from
cvs.


Reproduce code:
---------------
<?
$a1 = false or true; $a2 = true or false;
$b1 = true or false; $b2 = false and true;
$c = true xor true; 

echo("false or true = ");var_dump($a1);
echo("true or false = ");var_dump($a2);
echo("true and false = ");var_dump($b1);
echo("false and true = ");var_dump($b2);
echo("true xor true = ");var_dump($c);

?>

Expected result:
----------------
false or true = bool(true)
true or false = bool(true)
true and false = bool(false)
false and true = bool(false)
true xor true = bool(false)

Actual result:
--------------
false or true = bool(false)
true or false = bool(true)
true and false = bool(true)
false and true = bool(false)
true xor true = bool(true)