THEME_DIR
The THEME_DIR
constant defines the theme directory path. This is the path to the parent theme directory (or current theme directory if not using a child theme).
This constant should only be used for including PHP files. It should not be used for including features such as images, CSS, and JavaScript. For that, you should use the THEME_URI
constant.
Example Usage
The following code shows an example of the THEME_DIR
constant being used to load an admin functions file.
require_once( trailingslashit( THEME_DIR ) . 'functions-admin.php' );