What are the potential consequences of not properly handling session arrays in PHP, as seen in the forum thread example?

Improperly handling session arrays in PHP can lead to security vulnerabilities such as data manipulation, injection attacks, and unauthorized access to sensitive information. To mitigate these risks, developers should properly sanitize and validate user input before storing it in session arrays. 

// Fix for properly handling session arrays in PHP
session_start();

// Sanitize and validate user input before storing in session
$_SESSION['user_id'] = filter_var($_POST['user_id'], FILTER_SANITIZE_NUMBER_INT);
$_SESSION['username'] = filter_var($_POST['username'], FILTER_SANITIZE_STRING);

Keywords

session arrays PHP session hijacking security vulnerability data loss

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