What is the correct way to set and retrieve session variables in PHP?

When setting and retrieving session variables in PHP, you need to start the session using session_start() before you can access or set any session variables. To set a session variable, you can simply assign a value to $_SESSION['variable_name']. To retrieve a session variable, you can access it using $_SESSION['variable_name']. 

// Start the session
session_start();

// Set a session variable
$_SESSION['username'] = 'JohnDoe';

// Retrieve the session variable
$username = $_SESSION['username'];

echo $username; // Output: JohnDoe

Keywords

session variables PHP set retrieve syntax

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