What are the best practices for managing SESSION variables in PHP to prevent data leakage between different data sets?

When managing SESSION variables in PHP, it is important to ensure that data leakage between different data sets is prevented. One way to achieve this is by properly segregating session data for different users or data sets. This can be done by using unique session identifiers for each user and storing sensitive data in a secure manner. 

// Start or resume a session
session_start();

// Generate a unique session identifier for each user
session_regenerate_id(true);

// Store sensitive data in session variables securely
$_SESSION['user_id'] = 12345;
$_SESSION['username'] = 'john_doe';

Keywords

SESSION variables data leakage PHP security data sets

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