What are the implications of relying on register_globals for PHP scripts to function properly?

Relying on register_globals in PHP scripts can pose security risks as it can lead to variables being easily manipulated by external users. To ensure proper functionality and security, it is recommended to disable register_globals in the PHP configuration settings and instead use superglobal arrays like $_GET, $_POST, and $_REQUEST to access form data.

// Disable register_globals in php.ini or .htaccess file
// Use superglobal arrays to access form data instead

$variable = $_POST['variable']; // Accessing form data using $_POST superglobal array