What are the potential risks of using register_globals=on in PHP scripts?

When register_globals is set to on in PHP scripts, it can lead to security vulnerabilities such as injection attacks and data manipulation. It allows external input to overwrite global variables, making it easier for malicious users to manipulate the behavior of the script. To mitigate this risk, it is recommended to turn off register_globals in the PHP configuration and use superglobal arrays like $_GET, $_POST, and $_SESSION to access user input securely.

// To disable register_globals in PHP, add the following line to your php.ini file:
register_globals = Off;