In what scenarios would it be more appropriate to use JavaScript instead of PHP for gathering user information for an anonymity test?

When gathering user information for an anonymity test, it may be more appropriate to use JavaScript instead of PHP if you want to collect data without refreshing the page or sending requests to the server. JavaScript can handle client-side interactions smoothly, making it ideal for real-time data collection without server-side processing.

// PHP code snippet for gathering user information using JavaScript