Reads the stored record for a session (defaulting to the stored session
ID) whether or not it is expired, without pruning it. Used when a page
load cannot resume the stored session: getPreviousSessionData removes an
expired record when it is read, and the expired record's ID is what links
the replacement session to the one it replaced.
Reads the stored record for a session (defaulting to the stored session ID) whether or not it is expired, without pruning it. Used when a page load cannot resume the stored session: getPreviousSessionData removes an expired record when it is read, and the expired record's ID is what links the replacement session to the one it replaced.