wp-includes/deprecated.php:2957Retrieve current theme name.
stringfunction get_current_theme() { _deprecated_function( __FUNCTION__, '3.4.0', 'wp_get_theme()' ); if ( $theme = get_option( 'current_theme' ) ) return $theme; return wp_get_theme()->get('Name');}Introduced in 1.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/deprecated.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.