Description:
------------
When reporting that a class constant is undefined, the error message is only half 
useful in that it doesn't say which class is missing the constant.

Whilst I can accept that the constant may be present somewhere in the class 
structure, the calling class name would aid in the error.



Test script:
---------------
<?php
class A{ const NAME = 'A valid class'; }
class B{ }

foreach(array('A','B') as $s_ClassName){
    echo $s_ClassName::NAME, PHP_EOL;
}


Expected result:
----------------
A valid class
PHP Fatal error:  Undefined class constant 'NAME' for class 'B' in - on line 6


Actual result:
--------------
A valid class
PHP Fatal error:  Undefined class constant 'NAME' in - on line 6