wp-includes/class-wp-session-tokens.php:202Determines whether a session is still valid, based on its expiration timestamp.
$sessionarraybool final protected function is_still_valid( $session ) { return $session['expiration'] >= time(); }Introduced in 4.0.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-session-tokens.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.