php 时间转化为刚刚、几秒前、几分前、几天前等等，友好时间提示

/
　　* 友好时间显示
 */

 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;
 }