在 PHP 中减去日期
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Subtracting dates in PHP
提问by aslum
Possible Duplicate:
How to calculate the difference between two dates using PHP?
可能的重复：
如何使用 PHP 计算两个日期之间的差异？
I have timestamps stored in the format YYYY-MM-DD HH:MM:SS(for example 2010-06-21 20:12:56). What would the best way to check how old the timestamp is? For the moment I am mainly interested in the number of days old.
我有以格式存储的时间戳YYYY-MM-DD HH:MM:SS（例如2010-06-21 20:12:56）。检查时间戳的最佳方法是什么？目前我主要对天数感兴趣。
回答by Michael Mrozek
You can use strtotimeto convert the string to a UNIX timestamp, which is in seconds. time()will give you the current UNIX timestamp. Subtract them to get how old the date is in seconds, and divide by 60*60*24to get it in days
您可以使用strtotime将字符串转换为 UNIX 时间戳，以秒为单位。time()将为您提供当前的 UNIX 时间戳。减去它们以获得以秒为单位的日期，然后除以60*60*24以天为单位
It's also doable using DateTime::diff, although I find the date functions easier than using the classes
使用DateTime::diff也是可行的，尽管我发现日期函数比使用类更容易
回答by Nguyen
$today = strtotime(date('Y-m-d H:i:s'));
$expireDay = strtotime($row['ExpireDate']);
$timeToEnd = $expireDay - $today;
