getDifferenceAsString() публичный Метод

Returns a readable string with time difference
public getDifferenceAsString ( DateTime $time1, DateTime $time2 ) : string
$time1 DateTime
$time2 DateTime
Результат string
 /**
  * Returns a readable runtime
  *
  * @param $indexer
  * @return mixed
  */
 protected function getRuntime($indexer)
 {
     $dateTimeUtils = new DateTimeUtils();
     $startTime = new \DateTime($indexer->getStartedAt());
     $endTime = new \DateTime($indexer->getEndedAt());
     if ($startTime > $endTime) {
         return 'index not finished';
     }
     $lastRuntime = $dateTimeUtils->getDifferenceAsString($startTime, $endTime);
     return $lastRuntime;
 }