What are some potential pitfalls to avoid when using PHP to handle time-sensitive tasks in web applications?

One potential pitfall to avoid when using PHP to handle time-sensitive tasks in web applications is relying solely on the server's timezone settings, which may not always be accurate or consistent. To ensure accurate time handling, it's recommended to explicitly set the timezone in your PHP script using the `date_default_timezone_set()` function.

// Set the timezone to UTC to ensure consistent time handling
date_default_timezone_set('UTC');