make GPCS vars private, make GPCS methods return null when a key doesn't exist, introduce sort-of abstraction of $_SESSION along with lazy-calling of session_start
make GPCS vars private, make GPCS methods return null when a key doesn't exist, introduce sort-of abstraction of $_SESSION along with lazy-calling of session_start

gwilym/gwilym-php,gwilym/gwilym-php,gwilym/php-request-dispatcher