_backdrop_bootstrap_page_header in includes/bootstrap.inc

Invokes hook_boot() and sends HTTP headers.

backdrop_environment_initialize in includes/bootstrap.inc

Initializes the PHP environment.

_backdrop_log_error in includes/errors.inc

Logs a PHP error or exception and displays an error page in fatal cases.

backdrop_page_is_cacheable in includes/bootstrap.inc

Determines the cacheability of the current page.

backdrop_session_start in includes/session.inc

Starts a session forcefully, preserving already set session data.

drupal_is_cli in includes/drupal.inc

Detects whether the current script is running in a command-line environment.

install_finished in includes/install.core.inc

Finishes importing files at end of installation.

redirect_can_redirect in modules/redirect/redirect.module

Check the ability to perform redirects with the current request context.