PHP

date diff php

$datetime1 	= new DateTime('2020-10-11 16:52:52');
$datetime2 	= new DateTime('2020-10-13 16:52:52');
$interval 	= $datetime1->diff($datetime2);

echo $interval->format('%a days');

$interval = $datetime1->diff($datetime2);
$diffInSeconds = $interval->s; 
$diffInMinutes = $interval->i; 
$diffInHours   = $interval->h; 
$diffInDays    = $interval->d; 
$diffInMonths  = $interval->m; 
$diffInYears   = $interval->y; 

php date diff in days

$earlier = new DateTime("2010-07-06");
$later = new DateTime("2010-07-09");

$pos_diff = $earlier->diff($later)->format("%r%a"); //3
$neg_diff = $later->diff($earlier)->format("%r%a"); //-3