Description:
------------
---
From manual page: http://www.php.net/function.define#Examples
---

<?php
define("CONSTANT", "Hello world.",false);
echo CONSTANT; // outputs "Hello world."
echo Constant; // outputs "Constant" and issues a notice.

define("GREETING", "Hello you.", true);
echo GREETING; // outputs "Hello you."
echo Greeting; // outputs "Hello you."

?>

If the case_sensitive is true, why GREETING and Greeting output the same value (Hello you)? Then I put ,false just after "Hello world.", why CONSTANT and Constant output the different values? Plus the echo Constant; does not issue a notice.

Test script:
---------------
<?php
define("CONSTANT", "Hello world.",false);
echo CONSTANT; // outputs "Hello world."
echo Constant; // outputs "Constant" and issues a notice.

define("GREETING", "Hello you.", true);
echo GREETING; // outputs "Hello you."
echo Greeting; // outputs "Hello you."

?>

If the case_sensitive is true, why GREETING and Greeting output the same value (Hello you)? Then I put ,false just after "Hello world.", why CONSTANT and Constant output the different values? Plus the echo Constant; does not issue a notice.

Expected result:
----------------
<?php
define("CONSTANT", "Hello world.",false);
echo CONSTANT; // outputs "Hello world."
echo Constant; // outputs "Hello world."

define("GREETING", "Hello you.", true);
echo GREETING; // outputs "Hello you."
echo Greeting; // outputs Greeting

?>

Actual result:
--------------
<?php
define("CONSTANT", "Hello world.",false);
echo CONSTANT; // outputs "Hello world."
echo Constant; // outputs "Constant" and NEVER issues a notice.

define("GREETING", "Hello you.", true);
echo GREETING; // outputs "Hello you."
echo Greeting; // outputs "Hello you."

?>