$start_date = new DateTime("2020-06-17 7:11:25");
$end_date = new DateTime("2022-03-15 11:32:17");
$interval = $start_date->diff($end_date);
echo $interval->y . " years, " . $interval->m." months, ".$interval->d." days, ";
echo $interval->h . " hours, " . $interval->i." minutes, ".$interval->s." seconds";
/*
run:
1 years, 8 months, 26 days, 4 hours, 20 minutes, 52 seconds
*/