wp-includes/Requests/src/Requests.php:311Send a HEAD request
$url$headersoptional[]$optionsoptional[] public static function head($url, $headers = [], $options = []) { return self::request($url, $headers, null, self::HEAD, $options); }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/Requests/src/Requests.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.