Unless I force session start in php.ini session keys are not being created in /var/lib/php/session which do get created when I force it. When it is forced those session keys are not deleted upon sign out from the system.
According to php.ini the following are set .
session.save_handler = file
session.save_path = "/var/lib/php/session"
There are also settings in /etc/httpd/conf.d/php.conf
php_value session.save_handler "files"
php_value session.save_path "/var/lib/php/session"
php_value soap.wsdl_cache_dir "/var/lib/php/wsdlcache"
I have to assume these are overriding the parameters in /etc/php.ini