developer.woocommerce.com
New session handler in 2.5
Being stateless, WordPress doesn’t have an in-built way of handling session data. You can use cookies. You can implement PHP Sessions, but both have limitations and some hosts aren’t equipped to deal with them by default. Early on we decided to adopt a solution based on https://github.com/ericmann/wp-session-manager whereby you have a cookie to identify each user, […]
Mike Jolley