Event Duration

/**

Custom placeholder to get date/time difference between event start date and event end date

*/
add_filter('em_event_output_placeholder','my_em_days_duration_placeholders',1,3);
function my_em_days_duration_placeholders($replace, $EM_Event, $result){
	global $wp_query, $wp_rewrite;
	switch( $result ){
		case '#_EVENTDURATION':
			if ( !$EM_Event->event_all_day ){
				$replace = dateDiff($EM_Event->start,$EM_Event->end);
			}else{
				$replace = "Whole Day Event!";
			}
			break;
	}
	return $replace;
}

function dateDiff($time1, $time2, $precision = 6) {
    // If not numeric then convert texts to unix timestamps
    if (!is_int($time1)) {
      $time1 = strtotime($time1);
    }
    if (!is_int($time2)) {
      $time2 = strtotime($time2);
    }

    // If time1 is bigger than time2
    // Then swap time1 and time2
    if ($time1 > $time2) {
      $ttime = $time1;
      $time1 = $time2;
      $time2 = $ttime;
    }

    // Set up intervals and diffs arrays
    $intervals = array('year','month','day','hour','minute','second');
    $diffs = array();

    // Loop thru all intervals
    foreach ($intervals as $interval) {
      // Set default diff to 0
      $diffs[$interval] = 0;
      // Create temp time from time1 and interval
      $ttime = strtotime("+1 " . $interval, $time1);
      // Loop until temp time is smaller than time2
      while ($time2 >= $ttime) {
	$time1 = $ttime;
	$diffs[$interval]++;
	// Create new temp time from time1 and interval
	$ttime = strtotime("+1 " . $interval, $time1);
      }
    }

    $count = 0;
    $times = array();
    // Loop thru all diffs
    foreach ($diffs as $interval => $value) {
      // Break if we have needed precission
      if ($count >= $precision) {
	break;
      }
      // Add value and interval
      // if value is bigger than 0
      if ($value > 0) {
	// Add s if value is not 1
	if ($value != 1) {
	  $interval .= "s";
	}
	// Add value and interval to times array
	$times[] = $value . " " . $interval;
	$count++;
      }
    }

    // Return string with times
    return implode(", ", $times);
}