This is the order of loading of files when Wordpress loads up. I’m assuming a default installation and this is according to 1.3alpha4 as pulled from CVS.

Start up sequence (no templates):-


/index.php
    |– wp-blog-header.php
        |– wp-config.php
            | set MySQL settings and language
            |– wp-settings.php
                | set various variables…
                |– wp-includes/wp-db.php
                    | create the wpdb class
                | set table names
                |– wp-includes/functions.php
                    |– wp-includes/functions-compat.php
                    |?– wp-admin/upgrade-functions.php
                    |– wp-include/class-IXR.php
                |– wp-includes/functions-formatting.php
                |– wp-includes/functions-post.php
                |– wp-includes/classes.php
                |– wp-includes/template-functions.php
                    |– wp-includes/template-functions-general.php
                    |– wp-includes/template-functions-links.php
                    |– wp-includes/template-functions-author.php
                    |– wp-includes/template-functions-post.php
                    |– wp-includes/template-functions-category.php
                    |– wp-includes/template-functions-comment.php
                        |– wp-comments.php
                |– wp-includes/links.php
                |– wp-includes/kses.php
                |– wp-includes/wp-l10n.php
                | check if installed
                |– wp-includes/vars.php
                    |– wp-includes/version.php
                |– my-hacks.php
                |– wp-content/plugins/*  // all active plugins
                | register a shutdown hook
        |– wp-includes/wp-l10n.php       // none of this is working yet.
            |– /wp-config.php (require_once)
            | and set locale from above, default US
            |– wp-includes/stream.php
            |– wp-includes/gettext.php
            | define gettext like functions
            |– locale.php
        | handles path-info and URL handling, 404 redirect
        | set vars, send HTTP headers, get settings from DB
        | construct query, get result
        | do a template redirect based on query.
        |
        |– wp-header.php
            |?– header.php if exists
            |:– else echo HTML headers section down to div id=content
        |
        | output the posts and lots of other sorts of stuff
        |
        |– wp-footer.php
            |?– footer.php if exists
            |:– else
            |– wp-sidebar.php
                |?– sidebar.php if exists
                |: — else show sidebar
            | echo end of body and HTML

The order when using templates is very similar to the above (unless you do something in the template that specifically modifies the order).

This entry was posted on Wednesday, October 27th, 2004 at 17:11 pm and is filed under Wordpress. You can follow any responses to this entry through the RSS 2.0 feed.
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