function date_friend_tips($time){

     if (!$time)

         return false;

     if(!is_numeric($time)){

         $time = strtotime($time);

     }

     $d = TIMESTAMP - intval($time);

     $ld = $time - mktime(0, 0, 0, 0, 0, date('Y')); //得出年

     $md = $time - mktime(0, 0, 0, date('m'), 0, date('Y')); //得出月

     $byd = $time - mktime(0, 0, 0, date('m'), date('d') - 2, date('Y')); //前天

     $yd = $time - mktime(0, 0, 0, date('m'), date('d') - 1, date('Y')); //昨天

     $dd = $time - mktime(0, 0, 0, date('m'), date('d'), date('Y')); //今天

     $td = $time - mktime(0, 0, 0, date('m'), date('d') + 1, date('Y')); //明天

     $atd = $time - mktime(0, 0, 0, date('m'), date('d') + 2, date('Y')); //后天

     if ($d == 0) {

         $fdate = '刚刚';

     } else {

         switch ($d) {

             case $d < $atd:

                 $fdate = date('Y年m月d日', $time);

                 break;

             case $d < $td:

                 $fdate = '后天' . date('H:i', $time);

                 break;

             case $d < 0:

                 $fdate = '明天' . date('H:i', $time);

                 break;

             case $d < 60:

                 $fdate = $d . '秒前';

                 break;

             case $d < 3600:

                 $fdate = floor($d / 60) . '分钟前';

                 break;

             case $d < $dd:

                 $fdate = floor($d / 3600) . '小时前';

                 break;

             case $d < $yd:

                 $fdate = '昨天' . date('H:i', $time);

                 break;

             case $d < $byd:

                 $fdate = '前天' . date('H:i', $time);

                 break;

             case $d < $md:

                 $fdate = date('m月d日 H:i', $time);

                 break;

             case $d < $ld:

                 $fdate = date('m月d日', $time);

                 break;

             default:

                 $fdate = date('Y年m月d日', $time);

                 break;

         }

     }

     return $fdate;

 }