What is PHP session and how it works?
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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. The information is retrieved from the web server when a session is opened at the beginning of each web page. The session expires when the web page is closed.
Why do we need cookies and sessions?
Cookies allow you to proceed through many pages of a site quickly and easily without having to authenticate or reprocess each new area you visit. Session cookies allow users to be recognized within a website so any page changes or item or data selection you do is remembered from page to page.
How do PHP manage the sessions?
4 Answers
- the session id is sent to the user when his session is created.
- it is stored in a cookie (called, by default, PHPSESSID )
- that cookie is sent by the browser to the server with each request.
- the server (PHP) uses that cookie, containing the session_id, to know which file corresponds to that user.
Should I use session?
In general, use session data for storing larger state data. You can store things like authorization status in cookies too, if it’s needed for GUI, caching, etc. – but never trust it and never rely on it being present. Cookies are easy to delete and easy to fake.
What would you use a session for?
“Session” is the term used to refer to a user’s time browsing a web site. It’s meant to represent the time between their first arrival at a page in the site until the time they stop using the site. In practice, it’s impossible to know when the user is done with the site.
Where are PHP sessions stored?
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.
Why is session created in website?
To avoid storing massive amounts of information in-browser, developers use session IDs to store information server-side while enabling user privacy. Once a web developer accrues enough information on how users traverse their site, they can start to create very personalized, engaging experiences.
How do sessions work in PHP?
A PHP session is created with the session_start () function and is destroyed with the session_destroy () function. A PHP global variable, known as $_SESSION, is used to set values to session variables….Learn Working with Sessions in PHP.
| SYNTAX | DESCRIPTION |
|---|---|
| session_destroy(); | It is an in-built function used to destroy a PHP session. |
How do you start a session in PHP?
Each session is identified by a unique Id number for every visitor. The first step to use PHP session is to start the session. The starting session must precede the operations like HTML or the other. The statement session_start() starts the PHP session and registers the user’s information on the server.
How secure are PHP sessions?
PHP sessions are only secure as your application makes them. PHP sessions will give the user a pseudorandom string (“session ID”) for them to identify themselves with, but if that string is intercepted by an attacker, the attacker can pretend to be that user.
How do PHP sessions work?
How Does PHP Session Work. The Hyper Text Transfer Protocol is a stateless protocol. That means server just forget about you when your request is served and the connection between server and client is immediately closed after that. For example, when you made a request for page a.html, the server send you the a.html.
Is it possible to read a PHP session using JavaScript?
Not possible. Because JavaScript is client-side and session is server-side. To do anything related to a PHP session, you have to go to the server.