Purpose

Entry point for front-end requests. It only defines WP_USE_THEMES and hands off execution to wp-blog-header.php.

Flow

• Defines WP_USE_THEMES as true to signal that the theme should render.
• Requires wp-blog-header.php to bootstrap WordPress, run the main query, and load the template.

Key functions called

• require __DIR__ . '/wp-blog-header.php' (hands off to core loader and template pipeline).

Hooks fired

• None directly in this file. Hooks fire in wp-blog-header.php and downstream bootstrapping.