wp-includes/theme.php:3418Gets the registration config for a theme feature.
$featurestringarray|nullfunction get_registered_theme_feature( $feature ) { global $_wp_registered_theme_features; if ( ! is_array( $_wp_registered_theme_features ) ) { return null; } return $_wp_registered_theme_features[ $feature ] ?? null;}Introduced in 5.5.0. 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.