What are the potential pitfalls of using a PHP script to handle time-based operations?

One potential pitfall of using a PHP script to handle time-based operations is that the server's time zone settings may not be accurate, leading to incorrect calculations or unexpected behavior. To solve this issue, you can explicitly set the time zone in your PHP script using the `date_default_timezone_set` function.

// Set the time zone to UTC
date_default_timezone_set('UTC');

// Your time-based operations here