How does PHP handle timestamps on 64-bit systems compared to 32-bit systems?

On 32-bit systems, PHP uses a signed 32-bit integer to represent timestamps, which limits the range of dates that can be accurately represented. On 64-bit systems, PHP uses a 64-bit integer which allows for a much wider range of dates to be represented accurately. To ensure consistent handling of timestamps across different systems, it is recommended to use PHP's DateTime class which abstracts away the underlying integer representation.

// Example code using DateTime class to handle timestamps
$date = new DateTime();
echo $date->format('Y-m-d H:i:s');