- var_dump: documentation ( source)
<?php
$d1 = new DateTime('2019-06-12 15:32:15');
$d2 = new DateTime('2019-06-05');
var_dump($d2->diff($d1)->format("%a"));
$d1 = new DateTime('2019-06-12 15:32:15');
$d2 = new DateTime('2019-06-05 15:32:12');
var_dump($d2->diff($d1)->format("%a"));
$d1 = new DateTime('2019-06-12');
$d2 = new DateTime('2019-06-05 15:32:12');
var_dump($d2->diff($d1)->format("%a"));
$d1 = new DateTime('2019-06-12 00:00:00');
$d2 = new DateTime('2019-06-05 00:00:00');
var_dump($d2->diff($d1)->format("%a"));
/*
$datePeriod = new DatePeriod($d2,new DateInterval("P1D"), $d1);
//var_dump($datePeriod);
foreach($datePeriod as $dt)
{
var_dump($dt->format('Y-m-d'));
}
*/