[wp-hackers] concatinating PHP code files

[Will Anderson]

Decent IDE's have support for source navigation. I use NetBeans and it does
a wonderful job. Wonder what a function is doing? CTRL+Click to go to its
definition and find out. It also has an incredibly fast "Search in project"
feature that is great for finding where actions and filters are
defined/used.

In a pinch, you can also do much of that using a PHPXref of WordPress. Most
of the ones you can find on Google are a little out of date (WordPress 2.8.x
or so) but they work.