What best practices should be followed when converting date calculations to integer values in PHP to avoid inaccuracies?

When converting date calculations to integer values in PHP, it is important to use Unix timestamps to avoid inaccuracies due to time zones and daylight saving time changes. Unix timestamps represent the number of seconds since January 1, 1970, UTC. By using Unix timestamps, you can perform accurate date calculations and comparisons without worrying about time zone differences.

// Convert a date to an integer Unix timestamp
$date = strtotime('2022-01-01');
echo $date;

// Perform date calculations using Unix timestamps
$future_date = strtotime('+1 week', $date);
echo $future_date;