Find the definition of PHP Constant -

i wish know (as in php file) constant being defined. know of trick of getting done fast?

let's i'm not familiar whole system, need quick fix on constant. browsing through each includes files boring.

update i'm using notepad++ , accessing files through ftp client (filezilla).

i grep way mordor:

grep -l 'define..constant' * 

(note: run unix-like operating systems. don't know windows, editors should support similar).