Question

我希望使用时间戳和当前日期提醒一天。想知道我是否可以使用这些进行简单的减法。

如何计算currentdate -timestamp？

Answer 1

PHP的时间戳与Unix时间戳相同 - 自1970年1月1日起的秒数。所以是的，一个简单的减法会给你一个秒的时差，你可以通过潜水86,400（一天中的秒数）转换为天数：

$days = (time() - $oldtimestamp) / 86400;

Answer 2

还有使用DateTime和DateInterval类的首选选项。

$now  = new DateTime;
$then = new DateTime;
$then->setTimestamp($timestamp);

$diff = $now->diff($then);
echo $diff->days;

以上内容还将提供您感兴趣的年数，月数，天数等（以及显示的总天数）。

Answer 3

试试这个：

// Will return the number of days between the two dates passed in 
function count_days( $a, $b ) 
{ 
    // First we need to break these dates into their constituent parts: 
    $gd_a = getdate( $a ); 
    $gd_b = getdate( $b ); 
    // Now recreate these timestamps, based upon noon on each day 
    // The specific time doesn't matter but it must be the same each day 
    $a_new = mktime( 12, 0, 0, $gd_a['mon'], $gd_a['mday'], $gd_a['year'] ); 
    $b_new = mktime( 12, 0, 0, $gd_b['mon'], $gd_b['mday'], $gd_b['year'] ); 
    // Subtract these two numbers and divide by the number of seconds in a 
    // day. Round the result since crossing over a daylight savings time 
    // barrier will cause this time to be off by an hour or two. 
    return round( abs( $a_new - $b_new ) / 86400 ); 
}

Answer courtesy of the Doc

如何使用当前日期到减去时间戳来获取提醒日期？

3 个答案: