wp-includes/theme.php:697Gets the raw theme root relative to the content directory with no filters applied.
$stylesheet_or_templatestring$skip_cachebooloptionalfalsestringfunction get_raw_theme_root( $stylesheet_or_template, $skip_cache = false ) { global $wp_theme_directories; if ( ! is_array( $wp_theme_directories ) || count( $wp_theme_directories ) <= 1 ) { return '/themes'; } $theme_root = false; // If requesting the root for the active theme, consult options to avoid calling get_theme_roots(). if ( ! $skip_cache ) { if ( get_option( 'stylesheet' ) === $stylesheet_or_template ) { $theme_root = get_option( 'stylesheet_root' ); } elseif ( get_option( 'template' ) === $stylesheet_or_template ) { $theme_root = get_option( 'template_root' ); } } if ( empty( $theme_root ) ) { $theme_roots = get_theme_roots(); if ( ! empty( $theme_roots[ $stylesheet_or_template ] ) ) { $theme_root = $theme_roots[ $stylesheet_or_template ]; } } return $theme_root;}Introduced in 3.1.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/theme.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.