validate_current_theme()

Function: Checks that current theme files ‘index.php’ and ‘style.css’ exists.

Source: wp-includes/theme.php:772

get_theme_root()

Function: Retrieve path to themes directory.

Source: wp-includes/theme.php:542

theme_root

Filter Hook: Filters the absolute path to the themes directory.

Source: wp-includes/theme.php:561

get_theme_root_uri()

Function: Retrieve URI for themes directory.

Source: wp-includes/theme.php:579

theme_root_uri

Filter Hook: Filters the URI for themes directory.

Source: wp-includes/theme.php:612

get_template()

Function: Retrieve name of the current theme.

Source: wp-includes/theme.php:285

template

Filter Hook: Filters the name of the current theme.

Source: wp-includes/theme.php:293

template_directory

Filter Hook: Filters the current theme directory path.

Source: wp-includes/theme.php:317