Syntax
session_start();
$_SESSION["user_id"] = 42;Examples
PHP sessions example
A focused example you can adapt while practising.
session_start();
$_SESSION["user_id"] = 42;Best practices
- Start with the smallest working example, then adapt it to your project.
- Use the language’s standard library and idioms before introducing extra dependencies.
At a glance
- Purpose
- Server-side web applications
- File extension
- .php
- Runs in
- PHP runtime on a server or CLI
- Usually used with
- HTML, databases and web servers
Specifications & further reading
Related PHP documentation
PHP Request Data
PHP exposes HTTP request data through superglobal arrays such as $_GET and $_POST. Data from a request is untrusted and should be validated before use.PHP exceptions
PHP reference for php exceptions.PHP include and require
PHP reference for php include and require.PHP superglobals
PHP reference for php superglobals.
PHP exposes HTTP request data through superglobal arrays such as $_GET and $_POST. Data from a request is untrusted and should be validated before use.PHP exceptions
PHP reference for php exceptions.PHP include and require
PHP reference for php include and require.PHP superglobals
PHP reference for php superglobals.