What is the significance of the register_globals setting in PHP and how does it impact form handling?

The register_globals setting in PHP allows global variables to be automatically created from form input data, which can lead to security vulnerabilities such as variable injection attacks. It is recommended to disable register_globals to prevent these risks and handle form input data securely using PHP superglobal arrays like $_GET, $_POST, and $_REQUEST. 

// Disable register_globals in php.ini
register_globals = Off;

// Safe form handling using PHP superglobal arrays
$username = $_POST['username'];
$password = $_POST['password'];

Keywords

register_globals PHP form handling security vulnerability global variables

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