PHP通用函数 - 日期生成时间轴

 /**
  * 时间轴函数, Unix 时间戳
  * @param int $time 时间
  */
 function TranTime($time) {
     //$time = strtotime($time);
     $nowTime = time ();
     $message = '';
     //一年前
     if (idate ( 'Y', $nowTime ) != idate ( 'Y', $time )) {
         $message = date ( 'Y年m月d日', $time );
     }
     else {
         //同一年
         $days = idate ( 'z', $nowTime ) - idate ( 'z', $time );
         switch(true){
             //一天内
             case (0 == $days):
                 $seconds = $nowTime - $time;
                 //一小时内
                 if ($seconds < 3600) {
                     //一分钟内
                     if ($seconds < 60) {
                         if (3 > $seconds) {
                             $message = '刚刚';
                         } else {
                             $message = $seconds . '秒前';
                         }
                     }
                     $message = intval ( $seconds / 60 ) . '分钟前';
                 }
                 $message = idate ( 'H', $nowTime ) - idate ( 'H', $time ) . '小时前';
                 break;
                 //昨天
             case (1 == $days):
                 $message = '昨天' . date ( 'H:i', $time );
                 break;
                 //前天
             case (2 == $days):
                 $message = '前天 ' . date ( 'H:i', $time );
                 break;
                 //7天内
             case (7 > $days):
                 $message = $days . '天前';
                 break;
                 //超过7天
             default:
                 $message = date ( 'n月j日 H:i', $time );
                 break;
         }
     }
     return $message;
 }