php论坛中常用的两个时间差(多少分钟前,多少小时前,多少天前)

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<?php@ini_set('date.timezone', 'Asia/Shanghai');@ini_set('display_errors', 1);header('Content-Type:text/html;charset=utf-8');class Time{    public static function times($btime)    {        $result = '';        $time =time() - $btime ;        if($time < 60)        {            $result = $time.'秒前';        }        else if($time < 1800)        {            $result = floor($time/60).'分钟前';        }        else if($time < 3600)        {            $result = '半小时前';        }        else if($time < 86400)        {            $result = floor($time/3600).'小时前';        }        else        {            $zt = strtotime(date('Y-m-d 00:00:00'));            $qt = strtotime(date('Y-m-d 00:00:00',strtotime("-1 day")));            $st = strtotime(date('Y-m-d 00:00:00',strtotime("-2 day")));            $bt = strtotime(date('Y-m-d 00:00:00',strtotime("-7 day")));            if( $btime < $bt)            {                $result = date('Y-m-d H:i:s', $btime);            }            else if($btime < $st)            {                $result = floor($time/86400).'天前';            }            else if($btime < $qt)            {                $result = "前天".date('H:i', $btime);            }            else            {                $result = '昨天'.date('H:i', $btime);            }        }        return $result;    }}//测试$str='2013-09-25 00:13:05';echo Time::times(strtotime($str));

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