empty_var         171 ext/session/session.c 		zval empty_var;
empty_var         173 ext/session/session.c 		ZVAL_NULL(&empty_var);
empty_var         174 ext/session/session.c 		zend_hash_update(Z_ARRVAL_P(Z_REFVAL(PS(http_session_vars))), name, &empty_var);