function formatTime($time) {
  $time = (int) substr($time, 0, 10);
  $int = time() - $time;
  $str = '';
  if ($int <= 2){
   $str = sprintf('刚刚', $int);
  }elseif ($int < 60){
   $str = sprintf('%d秒前', $int);
  }elseif ($int < 3600){
   $str = sprintf('%d分钟前', floor($int / 60));
  }elseif ($int < 86400){
   $str = sprintf('%d小时前', floor($int / 3600));
  }elseif ($int < 2592000){
   $str = sprintf('%d天前', floor($int / 86400));
  }else{
   $str = date('Y-m-d H:i:s', $time);
  }
  return $str;
 }

 function formatTime($time)
 {
  $text = '';
  $time = intval($time);
  $ctime = time();
  $t = $ctime - $time; //时间差
  if ($t < 0) {
   return date('Y-m-d', $time);
  }
  ;
  $y = date('Y', $ctime) - date('Y', $time);//是否跨年
  switch ($t) {
   case $t == 0:
    $text = '刚刚';
    break;
   case $t < 60://一分钟内
    $text = $t . '秒前';
    break;
   case $t < 3600://一小时内
    $text = floor($t / 60) . '分钟前';
    break;
   case $t < 86400://一天内
    $text = floor($t / 3600) . '小时前'; // 一天内
    break;
   case $t < 2592000://30天内
    if($time > strtotime(date('Ymd',strtotime("-1 day")))) {
     $text = '昨天';
    } elseif($time > strtotime(date('Ymd',strtotime("-2 days")))) {
     $text = '前天';
    } else {
     $text = floor($t / 86400) . '天前';
    }
    break;
   case $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';
    }
    break;
   case $t < 31536000 && $y > 0://一年内 跨年
    $text = (11 - date('m', $time) + date('m', $ctime)) . '个月前';
    break;
   default:
    $text = (date('Y', $ctime) - date('Y', $time)) . '年前';
    break;
  }

  return $text;
 }

//格式化友好显示时间
function formatTime($time){
$now=time();
$day=date('Y-m-d',$time);
$today=date('Y-m-d');

$dayArr=explode('-',$day);
$todayArr=explode('-',$today);

//距离的天数，这种方法超过30天则不一定准确，但是30天内是准确的，因为一个月可能是30天也可能是31天
$days=($todayArr[0]-$dayArr[0])*365+(($todayArr[1]-$dayArr[1])*30)+($todayArr[2]-$dayArr[2]);
//距离的秒数
$secs=$now-$time;

if($todayArr[0]-$dayArr[0]>0 && $days>3){//跨年且超过3天
return date('Y-m-d',$time);
}else{

if($days<1){//今天
if($secs<60)return $secs.'秒前';
elseif($secs<3600)return floor($secs/60)."分钟前";
else return floor($secs/3600)."小时前";
}else if($days<2){//昨天
$hour=date('h',$time);
return "昨天".$hour.'点';
}elseif($days<3){//前天
$hour=date('h',$time);
return "前天".$hour.'点';
}else{//三天前
return date('m月d号',$time);
}
}
}