What are the advantages of working with timestamps instead of strings when dealing with date comparisons in PHP?

When dealing with date comparisons in PHP, working with timestamps instead of strings is advantageous because timestamps are standardized numerical values representing a specific point in time, making comparisons more accurate and efficient. Timestamps also allow for easier manipulation of dates using built-in PHP functions, such as date() and strtotime(). This approach helps avoid common pitfalls with date formatting and time zones when working with strings.

// Example of converting date strings to timestamps for comparison
$date1 = strtotime('2022-01-01');
$date2 = strtotime('2022-01-15');

if ($date1 < $date2) {
    echo 'Date 1 is before Date 2';
} else {
    echo 'Date 1 is after Date 2';
}