Are there any best practices or guidelines for securely passing variables between PHP pages and forms?

When passing variables between PHP pages and forms, it is important to ensure that the data is secure and cannot be tampered with by malicious users. One common best practice is to use PHP sessions to store and retrieve variables securely across different pages. This helps prevent data manipulation and protects sensitive information. 

// Start a session
session_start();

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

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

// Unset the session variable when no longer needed
unset($_SESSION['username']);

Keywords

security PHP variables forms data validation

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