OK, so I\'ve got this totally rare an unique scenario of a load balanced PHP website. The bummer is - it didn\'t used to be load balanced. Now we\'re starting to get issues.
When it comes to php session handling in the Load Balancing Cluster, it's best to have Sticky Sessions. For that ask the network of datacenter who is maintaining the load balancer to enable the sticky session. Once that is enabled you'll don't need worry about sessions at php end