Purpose

Bootstraps WordPress by defining ABSPATH and loading wp-config.php, which then loads wp-settings.php. If no config exists, it initiates the setup flow.

Flow

• Defines ABSPATH to the WordPress root if not already defined.
• Initializes a baseline error_reporting() level.
• Loads wp-config.php from the root, or one directory above if present and not another install.
• If no config is found:
  • Loads minimal core (version.php, compat.php, load.php).
  • Runs wp_check_php_mysql_versions() and wp_fix_server_vars().
  • Loads functions.php, computes setup URL, and redirects to setup-config.php.
  • Loads early translations and exits with wp_die() messaging.

Key functions called

• wp_check_php_mysql_versions()
• wp_fix_server_vars()
• wp_guess_url()
• wp_load_translations_early()
• wp_die()

Hooks fired

• None directly in this file.