is etc// You will need to define a save path also, if the module is other than files, like so:session_save_path('localhost:11211'); // memcache uses port 11211// or you can use multiple for load balancing:session_save_path('localhost:11211:41,otherhost:11211:60') // First part is hostname or path to socket, next is port and the last is the weight for that server//The function also returns the value