In WordPress source code, there is one point I can not understand. In /wp-blog-header.php, there is a call to wp() function. However, I can not find any definition for that function. How this call don't cause error?
Just follow the code :).
This file loads a lot of other files, initialising the core parts of WordPress. Amongst them, is the
You can see info about the wp() function on queryposts.com which also links to the function on trac. I also learned a surprising amount from Nacin's powerpoint slides from "You Don't Know Query" that discussion the