I swear I looked all over wp.org, but what is functions.php and what does it do? I'm developing my own template and I took my defalt theme out of my wp-content file, deleted the CSS and html and began templating my design. But in the file for hte default theme, there is a file called functions.php. I've looked all over but can't find anything about this file. Does anyone know what I'm talking about and can help me?