How many sessions 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.
Why are PHP sessions important?
Sessions are a simple way to store data for individual users against a unique session ID. This can be used to persist state information between page requests. Session IDs are normally sent to the browser via session cookies and the ID is used to retrieve existing session data.
Where are PHP sessions stored?
PHP Session Start By default, session data is stored in the server’s /tmp directory in files that are named sess_ followed by a unique alphanumeric string (the session identifier).
How does PHP store session data?
PHP Default Session Storage (File System): In PHP, by default session data is stored in files on the server. Each file is named after a cookie that is stored on the client computer. This session cookie (PHPSESSID) presumably survives on the client side until all windows of the browser are closed.
How do you initiate a PHP session?
Starting a PHP Session To begin a new session, simply call the PHP session_start() function. It will create a new session and generate a unique session ID for the user.
What is cookie and session in PHP?
A session is a global variable stored on the server. Each session is assigned a unique id which is used to retrieve stored values. Whenever a session is created, a cookie containing the unique session id is stored on the user’s computer and returned with every request to the server.
What is PHP session start?
session_start() creates a session or resumes the current one based on a session identifier passed via a GET or POST request, or passed via a cookie. When session_start() is called or when a session auto starts, PHP will call the open and read session save handlers.
How do you enable PHP sessions?
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.
Why are we using sessions in PHP?
session is also used for tracking user.i.e. when the user will login into his/her account it will show the login user name after successful login. Sessions are “storage compatments” that you can use to store data that is persistent in a php web app. Unlike cookies, sessions are stored server side.
How do you start a session in PHP?
PHP_SESSION_DISABLED: Sessions are currently disabled.
Is there alternative to using sessions in PHP?
– You can go with token based authentication – Cookie based authentication with encryption & decryption logic – Third party SSO