What role does the register_globals setting in php.ini play in the issue of variable overwriting in PHP scripts?

The register_globals setting in php.ini allows incoming form variables to be automatically registered as global variables, which can lead to security vulnerabilities such as variable overwriting. To solve this issue, it is recommended to disable the register_globals setting in php.ini and instead use superglobal arrays like $_GET, $_POST, and $_REQUEST to access form variables.

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