PHP把时间转换成几分钟前、几小时前、几天前的几个函数类

<?php
header("Content-type: text/html; charset=utf8");
date_default_timezone_set("Asia/Shanghai");   //设置时区
function time_tran($the_time) {
    $now_time = date("Y-m-d H:i:s", time());
	//echo $now_time;
    $now_time = strtotime($now_time);
    $show_time = strtotime($the_time);
    $dur = $now_time - $show_time;
    if ($dur < 0) {
        return $the_time;
    } else {
        if ($dur < 60) {
            return $dur . '秒前';
        } else {
            if ($dur < 3600) {
                return floor($dur / 60) . '分钟前';
            } else {
                if ($dur < 86400) {
                    return floor($dur / 3600) . '小时前';
                } else {
                    if ($dur < 259200) {//3天内
                        return floor($dur / 86400) . '天前';
                    } else {
                        return $the_time;
                    }
                }
            }
        }
    }
}


echo time_tran("2014-7-8 19:22:01");

	?>



	
<?php
function time_tran($the_time){
   $now_time = date("Y-m-d H:i:s",time()+8*60*60);
   $now_time = strtotime($now_time);
   $show_time = strtotime($the_time);
   $dur = $now_time - $show_time;
   if($dur < 0){
    return $the_time;
   }else{
    if($dur < 60){
     return $dur.'秒前';
    }else{
     if($dur < 3600){
      return floor($dur/60).'分钟前';
     }else{
      if($dur < 86400){
       return floor($dur/3600).'小时前';
      }else{
       if($dur < 259200){//3天内
        return floor($dur/86400).'天前';
       }else{
        return $the_time;
       }
      }
 }
<?php
function format_date($time){
    $t=time()-$time;
    $f=array(
        '31536000'=>'年',
        '2592000'=>'个月',
        '604800'=>'星期',
        '86400'=>'天',
        '3600'=>'小时',
        '60'=>'分钟',
        '1'=>'秒'
    );
    foreach ($f as $k=>$v)    {
        if (0 !=$c=floor($t/(int)$k)) {
            return $c.$v.'前';
        }
    }
}
?>
<?php
function formatTime($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';
       }
    }
}
?>
<?php
/*
 * 时间计算(年，月，日，时，分，秒)
 * $createtime 可以是当前时间
 * $gettime 你要传进来的时间
 */
class Mygettime{
        function  __construct($createtime,$gettime) {
            $this->createtime = $createtime;
            $this->gettime = $gettime;
    }
    function getSeconds()
    {
            return $this->createtime-$this->gettime;
        }
    function getMinutes()
       {
       return ($this->createtime-$this->gettime)/(60);
       }
      function getHours()
       {
       return ($this->createtime-$this->gettime)/(60*60);
       }
      function getDay()
       {
        return ($this->createtime-$this->gettime)/(60*60*24);
       }
      function getMonth()
       {
        return ($this->createtime-$this->gettime)/(60*60*24*30);
       }
       function getYear()
       {
        return ($this->createtime-$this->gettime)/(60*60*24*30*12);
       }
       function index()
       {
            if($this->getYear() > 1)
            {
                 if($this->getYear() > 2)
                    {
                        return date("Y-m-d",$this->gettime);
                        exit();
                    }
                return intval($this->getYear())." 年前";
                exit();
            }
             if($this->getMonth() > 1)
            {
                return intval($this->getMonth())." 月前";
                exit();
            }
             if($this->getDay() > 1)
            {
                return intval($this->getDay())." 天前";
                exit();
            }
             if($this->getHours() > 1)
            {
                return intval($this->getHours())." 小时前";
                exit();
            }
             if($this->getMinutes() > 1)
            {
                return intval($this->getMinutes())." 分钟前";
                exit();
            }
           if($this->getSeconds() > 1)
            {
                return intval($this->getSeconds()-1)." 秒前";
                exit();
            }
       }
  }
//类的使用实例
/*
 *
 * 调用类输出方式
 *
 * $a = new Mygettime(time(),strtotime('-25 month'));
 * echo iconv('utf-8', 'gb2312', $a->index())?iconv('utf-8', 'gb2312', $a->index()):iconv('utf-8', 'gb2312', '当前');
 *
 */