function to get the time past from a date

time_laspe.php

    public static function time_elapsed_string($datetime, $full = false, $msgFuture = "to go", $msgPresent = " just now", $msgPast = " ago") {
        if (isset($datetime)) {
            $now = new \DateTime;
            $date = new \DateTime($datetime);
            $diff = $now->diff($date);
            $datePosition = " ago";
            if ($now < $date) {
                $datePosition = $msgFuture;
            }

            $diff->w = floor($diff->d / 7);
            $diff->d -= $diff->w * 7;

            $string = array(
                'y' => 'year',
                'm' => 'month',
                'w' => 'week',
                'd' => 'day',
                'h' => 'hour',
                'i' => 'minute',
                's' => 'second',
            );
            foreach ($string as $k => &$v) {
                if ($diff->$k) {
                    $v = $diff->$k . ' ' . $v . ($diff->$k > 1 ? 's' : '');
                } else {
                    unset($string[$k]);
                }
            }

            if (!$full)
                $string = array_slice($string, 0, 1);
            return $string ? implode(', ', $string) . $datePosition : 'just now';
        }else {
            return "not set";
        }
    }