Define WP_PLUGIN_DIR before loading db.php

[sirzooro]

In my plugin (DB Cache Reloaded) I provide custom db.php file, and in in I need to know the plugin directory. Unfortunately WP_PLUGIN_DIR is defined after this file is loaded, so now I have to define it in my plugin.

Attached patch moves this define before db.php is loaded.

[Denis-de-Bernardy]

Is this not to allow plugins to override it or something? If not, would it make sense to move a couple more defines?

[nacin]

Many default constants are defined at specific places so they can be overridden (like here). The plugin directory constants for example may be defined in sunrise.php. You can wait until after WP_PLUGIN_DIR is defined to do what you need, or simply define it.