What potential issues can arise from relying on global variables in PHP sessions?

Relying on global variables in PHP sessions can lead to security vulnerabilities, as global variables can be easily manipulated by malicious users. To solve this issue, it is recommended to use the $_SESSION superglobal array provided by PHP to store session data securely. 

// Start the session
session_start();

// Store data in the session using the $_SESSION superglobal array
$_SESSION['username'] = 'example_user';

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

Keywords

global variables PHP sessions security vulnerabilities data leakage session hijacking

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