What is a PHP session?

A PHP session is used to store data on a server rather than the computer of the user. Session identifiers or SID is a unique number which is used to identify every user in a session based environment.

What is PHP session how session is created and destroyed?

Destroying a PHP Session A PHP session can be destroyed by session_destroy() function. This function does not need any argument and a single call can destroy all the session variables. If you want to destroy a single session variable then you can use unset() function to unset a session variable.

How does session work in PHP?

PHP responds by sending a unique token that identifies the current session. This is known as the session ID. In all subsequent requests, the browser sends the session ID to say, “Hey, it’s me again.” All other data related to the session is stored on the web server. Only the session ID gets passed back and forth.

Is PHP session ID unique?

Sessions are uniquely defined by an ID. This session ID is stored on the user’s computer in a cookie and passed back to the server on every request. PHP Sessions behave the same way. If an attacker steals your session ID, they can impersonate you without the server being able to tell the difference.

What is PHP session and how it works?

In PHP, a session provides a way to store web page visitor preferences on a web server in the form of variables that can be used across multiple pages. Unlike a cookie, variable information is not stored on the user’s computer. The session sets a tiny cookie on the user’s computer to serve as a key.

What is PHP session_start () and Session_destroy () function?

session_destroy() destroys all of the data associated with the current session. It does not unset any of the global variables associated with the session, or unset the session cookie. To use the session variables again, session_start() has to be called. Note: You do not have to call session_destroy() from usual code.

How long does PHP session last?

The default lifetime of a session in PHP is 1440 seconds, or 24 minutes.

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 to enable PHP session?

Enable PHP Session State In Windows® Explorer, create the session subdirectory in the PHP installation directory. Right-click the session directory, and select Properties. In the Security tab, click Edit. Click Add, and enter IIS_IUSRS for Enter the object names to select. Click OK. Select the Modify permission check box, and click OK. Click OK in the Session Properties window.

What is the session ID in PHP?

1) Near the beginning of the program a directive to start the session must be given. 2) To save any name-value pair they need to registered with the state data. 3) After the name-value pair has been registered, the value can be retrieved easily:

What is a session variable in PHP?

A session is a method of storing data (using variables) so the browser can use it throughout multiple webpages.

PHP sessions. A session in PHP is a secure way to track a user from page to page. With a session, you can store information about users, such as their e-mail address, name, phone number, and whatever other details you have, and automatically fill in that information wherever it’s needed on the site. For example,…