友好时间输出

public static function formatTime($date) {
   $str = '';
   /* if(is_string($date))
   {
      $timer = strtotime($date);
   }
   else{
      $timer=$date;
   } */

   $timer=$date;

   $diff = $_SERVER['REQUEST_TIME'] - $timer;
   $day = floor($diff / 86400);
   
   if($day > 0) {
           if($day<7)
           {
               return $day."天前";
           }
           else
           {
               return date('Y-m-d', $timer);
           }
   }
       
   $free = $diff % 86400;
   if($free>0){
      $hour = floor($free / 3600);
      if($hour>0){
         return $hour."小时前";
      }
      
      $free = $free % 3600;
      if($free>0){
         $min = floor($free / 60);
         
         if($min>0){
            return $min."分钟前";
         }
         $free = $free % 60;
         if($free>0){
            return $free."秒前";
         }
         return '刚刚';
      }
      return '刚刚';
   }
   
   return '刚刚';
}