php 设置友好时间

public static function formatTime($time)
{
    if (is_int($time)) {
        $time = intval($time);
    } elseif ($time instanceof Carbon) {
        $time = intval(strtotime($time));
    } else {
        return '';
    }
    $ctime = time();
    $t = $ctime - $time; //时间差 （秒）
    if ($t < 0) {
        return date('Y-m-d', $time);
    }
    $y = intval(date('Y', $ctime) - date('Y', $time));//是否跨年
    /**/
    $today=strtotime(date('Y-m-d',strtotime('0 day')));
    if($time > $today) {//一天内
        $text = '今天'.date(" H:i",$time); // 一天内
    } elseif ($t < 2592000) {//30天内
        if ($time > strtotime(date('Ymd', strtotime("-1 day")))) {
            $text = '昨天'.date(" H:i",$time);
        } elseif ($time > strtotime(date('Ymd', strtotime("-2 days")))) {
            $text = '前天'.date(" H:i",$time);
        } else {
            $text = floor($t / 86400) . '天前';
        }
    } elseif ($t < 31536000 && $y == 0) {//一年内 不跨年
        $m = date('m', $ctime) - date('m', $time) - 1;
        if ($m == 0) {
            $text = floor($t / 86400) . '天前';
        } else {
            $text = $m . '个月前';
        }
    } elseif ($t < 31536000 && $y > 0) {//一年内 跨年
        $text = (12 - date('m', $time) + date('m', $ctime)) . '个月前';
    } else {
        $text = (date('Y', $ctime) - date('Y', $time)) . '年前';
    }
    return $text;
}