foreach($commentsas$k=>&$v){$s=(int)($nowtime-$v['create_time']);if((0<$s)&&($s<60)){$v['time_num']=$s.'秒前';}elseif((60<$s)&&($s<3600)){$mins=$s/60;$v['time_num']=floor($mins).'分钟前';}elseif((3600<$s)&&($s<86400)){$hours=$s/3600;$v['time_num']=floor($hours).'小时前';}elseif($s>=86400){$days=$s/86400;$v['time_num']=floor($days).'天前';}}