What are session variables in PHP?

What is a PHP Session? Session variables solve this problem by storing user information to be used across multiple pages (e.g. username, favorite color, etc). By default, session variables last until the user closes the browser.

What is session in PHP explain with example?

In general, session refers to a frame of communication between two medium. 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.

How can we store variable in session in PHP?

Starting a PHP Session Session variables are stored in associative array called $_SESSION[]. These variables can be accessed during lifetime of a session. The following example starts a session then register a variable called counter that is incremented each time the page is visited during the session.

What is session variable?

A session variable is a special type of variable whose value is maintained across subsequent web pages. With session variables, user-specific data can be preserved from page to page delivering customized content as the user interacts with the web application.

What is session with example?

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.

How do I start 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. The PHP code in the example below simply starts a new session.

How do you set a session variable?

Starting a Session To start PHP sessions, you must use the function session_start() . To set session variables, you will need to apply a global PHP $_SESSION variable . Note: The PHP session_start() function has to be the first thing in your document: all HTML tags come after.

Why session is used in PHP?

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. The absence of an ID or session cookie lets PHP know to create a new session, and generate a new session ID.

How do I start a session?

Before you can store any information in session variables, you must first start up the 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.

How to use variable variables in PHP?

PHP allows you to use dynamic variable names , called variable variables. You can name a variable with the value stored in another variable. That is, one variable contains the name of another variable. For example, suppose you want to construct a variable named $city with the value Los Angeles. You can use the following statement:

What is variable scope in PHP?

The scope of a variable in PHP is the context in which the variable was created, and in which it can be accessed. Essentially, PHP has 2 scopes: Variable scope — and, in particular, local scope — make your code easier to manage.

What is the session ID in PHP?

Definition and Usage. Sessions or session handling is a way to make the data available across various pages of a web application.

What is a session in PHP?

What is a Session. A PHP session stores data on the server rather than user’s computer. In a session based environment, every user is identified through a unique number called session identifier or SID. This unique session ID is used to link each user with their own information on the server like emails, posts, etc.