剩余时间是指一篇文章什么时候发布到现在有几分钟或几天了，这个在很多博客论坛都以看到文章1天以前发布的，下面我介绍两实例
把两个日期格式的字符串转化成unix时间戳，然后相减获得时间戳差。最后判断剩余时间，生成类似（2小时30分钟20秒前发布）这样的时间格式
| 代码如下 | 复制代码 |
|
public function gettime($time_s,$time_n){ |
|
首先判断想减之后的值是否大于一天的秒数86400秒，如果大于的话就返回原来的数据库查询出来的时间
然后判断是否在1小时到一天之内，也就是3600秒-86400秒，如果是之内的话就返回X小时。得到结果后还需使用取余数的方法去除小时部分的时间，使用 %取余
然后判断是否在1分钟到一小时之内，也就是60秒-3600秒，如果是之内的话就返回X分钟。得到结果后还需使用取余数的方法去除分钟部分的时间，使用 %取余
最后判断是否在1分钟之内，也就是0秒-60秒，如果是之内的话就返回X分秒
注意：上面得出的结果都是使用.=连接的。这样最后才得到一个整体的时间。
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