时间格式转换 X小时前

/**
 * 时间转换
 * @param $date //YY-MM-DD HH:II:SS
 * @return string
 */
public static function timeChange($date)
{
    $str = '';
    $timer = strtotime($date);
    $diff = $_SERVER['REQUEST_TIME'] - $timer;

    $day = floor($diff / 86400);
    $free = $diff % 86400;
    if($day > 0)
    {
        return $day."天前";
    }
    else
    {
        if($free>0)
        {
            $hour = floor($free / 3600);
            $free = $free % 3600;
            if($hour>0)
            {
                return $hour."小时前";
            }
            else
            {
                if($free>0)
                {
                    $min = floor($free / 60);
                    $free = $free % 60;
                    if($min>0)
                    {
                        return $min."分钟前";
                    }
                    else
                    {
                        if($free>0)
                        {
                            return $free."秒前";
                        }
                        else
                        {
                            return '刚刚';
                        }
                    }
                }
                else
                {
                    return '刚刚';
                }
            }
        }
        else
        {
            return '刚刚';
        }
    }
}

/**

 * 时间转换

 * 三天前显示 
X天前
 * 三天后显示 
YY-MM-DD HH:II:SS
 * @param $date //YY-MM-DD HH:II:SS * @return string */public static function timeChange($date){    $str = '刚刚';    $timer = strtotime($date);    $diff = $_SERVER['REQUEST_TIME'] - $timer;    $day = floor($diff / 86400);    $free = $diff % 86400;    if($day > 0 && $day < 3) {        $str =  $day."天前";    }else if ($day > 3){        $str =  date("Y-m-d",$timer);    }else {        if($free > 0) {            $hour = floor($free / 3600);            $free = $free % 3600;            if($hour > 0) {                $str =  $hour."小时前";            } else {                if($free > 0) {                    $min = floor($free / 60);                    $free = $free % 60;                    if($min > 0) {                        $str =  $min."分钟前";                    } else {                        if($free > 0) {                            $str =  $free."秒前";                        }                    }                }            }        }    }    return $str;}