How do I manage a session between multiple servers?

3 Answers. If you are deploying application on more than one server, you should use “Clustering”. Application servers are able to handle this scenario using “session replication”. With session replication, each server will have a copy of the active users session.

What is PHP load balancer?

Load balancing is where requests are distributed uniformly across servers in a server pool. Load balancers receive user requests and determine which server in a server pool to forward the request for final processing.

What is session management How do you manage a session in PHP?

Overview. An overview of PHP session management is shown in Figure 8-1. When a user first enters the session-based application by making a request to a page that starts a session, PHP generates a session ID and creates a file that stores the session-related variables.

How many session can PHP handle?

1000+ sessions can still be perfectly handled by standard PHP file based sessions. If you notice that is getting a problem, you can exchange the session backend easily. There are pluggable session handlers for memcached or other memory or database based storage systems.

How do I share a session between two servers?

Session Sharing between same application deployed on two or more Web Servers. Add NCache Session State Provider Assembly. Keep same machine key across Web Servers in Load balanced Webfarm. Deploy same application on all webservers which are load balanced.

How do you maintain a session across multiple applications?

3 Answers. First, configure the sessionState element in your web. config to use cookieName=”SOME_COOKIE_NAME_HERE” in both apps. Then, just make sure the urls have the same TLD (top-level domain), i.e. app1.mydomain.com and app2.mydomain.com and you should be able to handle the Session_Start event in Global.

Can PHP handle high traffic?

PHP has been designed ground up to efficiently handle HTTP traffic, there is less to build in comparison to building using other compiled languages. PHP, when properly written, can be scaled to a great extent. Other limiting factors include the database engine that is used.

How does session management work in PHP?

PHP session is used to store and pass information from one page to another temporarily (until user close the website). PHP session creates unique user id for each browser to recognize the user and avoid conflict between multiple browsers.

Is PHP session server side?

Yes, the session data is on the server only.

How many ways can a session data be stored?

How many ways can a session data be stored? Explanation: Within flat files(files), within volatile memory(mm), using the SQLite database(sqlite), or through user defined functions(user). 3.

How can you maintain session state in the web tier?

Session state can be stored in a cookie on the client tier for use by the server when formulating responses.

1. Rewrite URLs to include the encoded state. URL rewriting is the technique of encoding every URL on a served page to include client-side session state.
2. Keep the state in hidden form variables.

What is session support in PHP?

Session support in PHP consists of a way to preserve certain data across subsequent accesses. This enables you to build more customized applications and increase the appeal of your web site. A visitor accessing your web site is assigned a unique id, the so-called session id.

Is there a $_session for each user on the site?

There is a seperate $_SESSION created for each user. This is all done by the server, you don’t have to worry about it. When writing your code, treat the $_SESSION as if there was only one user on the site. Edit: Actually, on thinking about it, it is a very good question to ask.

Why should I use Memcached to store my PHP sessions?

Storing PHP sessions in Memcached has the advantage of being able to distribute them to multiple cloud servers running Memcached, so as to maintain session redundancy. Without this Memcached setup, if your application is being load balanced on multiple servers, it would be necessary to configure session stickiness on the load balancer.

How to replicate session data across multiple memcached servers?

The memcache.session_redundancy directive must be equal to the number of memcached servers + 1 for the session information to be replicated to all the servers. This is due to a bug in PHP. These directives enable session failover and redundancy, so PHP writes the session information…