[英]PHP get 00:00:00 of a unix timestamp
If I got a unix time which is eg 如果我得到一个unix时间,例如
1407050129
How do I get the 12:00AM of that unix day in unix timestamp , means the first minute of the day of that unix time. 如何在unix时间戳中获取该unix日的12:00 AM,表示该unix时间的第一分钟。
Example if i want get today first minute 如果我想今天第一分钟得到的例子
$today_first_min = strtotime("00:00:00");
An alternate method to arrive at the same result... Unix time is a count of seconds since 1970-01-01 00:00:00 UTC, so each whole day is a multiple of (60*60*24) seconds. 另一种获得相同结果的方法... Unix时间是自1970-01-01 00:00:00 UTC以来的秒数,因此每一天都是(60 * 60 * 24)秒的倍数。
Using this fact you can use the modulus operator (%) to calculate and then remove the remainder (ie. the seconds, hours and minutes) from the day, and get back to the first hours! 使用此事实,您可以使用模数运算符(%)计算,然后从当天删除剩余部分(即秒,小时和分钟),并回到第一个小时!
date_default_timezone_set('UTC');
$that_date = 1407050129;
$first_hour = $that_date - ($that_date % (60*60*24));
print date('Y-m-d H:i:s', strval($first_hour));
// 2014-08-03 00:00:00
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