在 PHP 中获取一周前的时间戳？
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Get the timestamp of exactly one week ago in PHP?
提问by Mike Crittenden
I need to calculate the timestamp of exactly 7 days ago using PHP, so if it's currently March 25th at 7:30pm, it would return the timestamp for March 18th at 7:30pm.
我需要使用 PHP 计算恰好 7 天前的时间戳，因此如果当前是 3 月 25 日晚上 7:30，它将返回 3 月 18 日晚上 7:30 的时间戳。
Should I just subtract 604800 seconds from the current timestamp, or is there a better method?
我应该从当前时间戳中减去 604800 秒，还是有更好的方法？
回答by SilentGhost
strtotime("-1 week")
回答by Aaron W.
回答by Luís Guilherme
There is the following example on PHP.net
PHP.net上有以下示例
<?php
$nextWeek = time() + (7 * 24 * 60 * 60);
// 7 days; 24 hours; 60 mins; 60secs
echo 'Now: '. date('Y-m-d') ."\n";
echo 'Next Week: '. date('Y-m-d', $nextWeek) ."\n";
// or using strtotime():
echo 'Next Week: '. date('Y-m-d', strtotime('+1 week')) ."\n";
?>
Changing + to - on the first (or last) line will get what you want.
将第一行（或最后一行）的 + 更改为 - 将得到您想要的结果。
回答by Pawe? Tomkiel
From PHP 5.2you can use DateTime:
从PHP 5.2 开始，您可以使用DateTime：
$timestring="2015-03-25";
$datetime=new DateTime($timestring);
$datetime->modify('-7 day');
echo $datetime->format("Y-m-d"); //2015-03-18
Instead of creating DateTimewith string, you can setTimestampdirectly on object:
DateTime您可以直接在对象上设置时间戳，而不是使用字符串创建：
$timestamp=1427241600;//2015-03-25
$datetime=new DateTime();
$datetime->setTimestamp($timestamp);
$datetime->modify('-7 day');
echo $datetime->format("Y-m-d"); //2015-03-18
回答by Navdeep Singh
<?php
$before_seven_day = $date_timestamp - (7 * 24 * 60 * 60)
// $date_timestamp is the date from where you found to find out the timestamp.
?>
you can also use the string to time function for converting the date to timestamp. like
您还可以使用 string to time 函数将日期转换为时间戳。喜欢
strtotime(23-09-2013);
