用php计算两个日期相差多少
欢迎进入Linux社区论坛,与200万技术人员互动交流 >>进入 用php计算给定两个日期相差多少天: 计算方法不只下面介绍的这些,只是一些比较常规的方法: 如要计算2009-12-09和2009-12-05相差多少天: ?php $startdate=strtotime(“2009-12-09”); $enddate=strtoti
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用php计算给定两个日期相差多少天:
计算方法不只下面介绍的这些,只是一些比较常规的方法:
如要计算2009-12-09和2009-12-05相差多少天:
$startdate=strtotime(“2009-12-09”);
$enddate=strtotime(“2009-12-05”);
上面的php时间日期函数strtotime已经把字符串日期变成了时间戳,这样只要让两数值相减,然后把秒变成天就可以了,比较的简单,如下:
$days=round(($enddate-$startdate)/3600/24) ;
echo $days; //days为得到的天数;
?>
下面介绍另外一种方法:
上面判断的是两个日期的大小,下面则是判断生日的程序代码,得到的$n就是相距生日的天数.
$birthday=“生日”;
$birthday = preg_replace('/\d+/', Date('Y'), $birthday, 1);
$d = 60*60*24;
$n= floor((strtotime($birthday)-time())/$d);
$n=$n+1;
还有如果相比的是现在的时间,就可以用time()函数,得到的就是现在的时间戳.
第二种情况呢,就是有数据库,这样就相对比较容易一些了!如果是MSSQL可以使用触发器!用专门计算日期差的函数datediff()计算便可!
如果是MYSQL那就用两个日期字段的时间戳值,进行计算后便可得到相差的天数了.方法和上面的代码很像.

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