php格式化时间戳

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);		}	}}