What precautions should be taken to ensure that session data is not accessible from outside sources in PHP?

To ensure that session data is not accessible from outside sources in PHP, it is important to properly configure session settings, use HTTPS for secure communication, and validate and sanitize user input to prevent session hijacking or data leakage. 

// Start a secure session
ini_set('session.cookie_httponly', 1);
ini_set('session.use_only_cookies', 1);
session_start();

// Set session data
$_SESSION['user_id'] = 123;

// Access session data
echo $_SESSION['user_id'];

Keywords

Session hijacking session fixation secure session handling session_regenerate_id session_set_save_handler

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