Why does datetime->days always returns a positive number
datetime, php
Solution
You could use `DateInterval::format`.
`return $interval->format("%r%a");`
Cast to int if needed:
`return (int)$interval->format("%r%a");`
Problem
``` // Difference from a date in the future: $a = new DateTime('2000-01-01'); $b = new DateTime('2000-01-05'); $interval = $b->diff($a); return $interval->days; // Returns 4 // Difference from a date in the past: $a = new DateTime('2000-01-01'); $b = new DateTime('1999-12-28'); $interval = $a->diff($b); // Arguments swapped return $interval->days; // Returns 4 ``` Why do both of these functions return positive 4? How do I return a negative number if a date is in the past?