PHP sessions in a load balancing cluster - how?

Question

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.

Answer 1

The way we handle this is through memcached. All it takes is changing the php.ini similar to the following:

session.save_handler = memcache
session.save_path = "tcp://path.to.memcached.server:11211"

We use AWS ElastiCache, so the server path is a domain, but I'm sure it'd be similar for local memcached as well.

This method doesn't require any application code changes.