[xdebug-general] Getting value of define()s

I am debugging a PHP application that uses many define() functions. Is
there any way to get the values of define() later in the code where
the identifier is used? F11 only shows conventional variables, and F12
on the defined identifier returns only the identifier name.

This is with xdebug 2.1.0 on PHP 5.3 running on Ubuntu Server 12.04,
as used in VIM 7.3.

Note that this question was originally posted to Stack Overflow, but
it seems that xdebug expertise for this esoteric case is better found
here in the mailing list.
http://stackoverflow.com/questions/17419227/getting-value-of-defines

Thanks!

--
Dotan Cohen
http://gibberish.co.il
http://what-is-what.com