wp-includes/compat-utf8.php:415Fallback support for determining if a string contains Unicode noncharacters.
$textstringboolfunction _wp_has_noncharacters_fallback( string $text ): bool { _deprecated_function( __FUNCTION__, '7.1.0' ); return wp_has_noncharacters( $text );}Introduced in 6.9.0. Unchanged from 6.9.7 through 7.1.0.
Signature, return type and hooks compared across 3 parsed releases.
src/wp-includes/compat-utf8.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.