How can PHP be used to manipulate and format time values efficiently and accurately?

PHP provides a variety of built-in functions for manipulating and formatting time values efficiently and accurately. Functions like `date()`, `strtotime()`, and `DateTime` can be used to perform operations such as adding or subtracting time, formatting time in different ways, and converting between different time formats. By utilizing these functions effectively, developers can easily work with time values in PHP.

// Example: Formatting a timestamp to a human-readable date format
$timestamp = time(); // Get the current timestamp
$date = date('Y-m-d H:i:s', $timestamp); // Format the timestamp as YYYY-MM-DD HH:MM:SS
echo $date; // Output the formatted date