Are there any best practices for handling time zone conversions in PHP, especially when dealing with servers in different regions?

When dealing with time zone conversions in PHP, it's important to set the default time zone for your script using the `date_default_timezone_set()` function. Additionally, you can use the `DateTime` class to easily convert between time zones by creating new `DateTime` objects and using the `setTimezone()` method.

// Set the default time zone for the script
date_default_timezone_set('America/New_York');

// Create a new DateTime object with the current time
$now = new DateTime();

// Convert the time to a different time zone
$now->setTimezone(new DateTimeZone('Asia/Tokyo'));

// Output the converted time
echo $now->format('Y-m-d H:i:s');