php - 在 PHP 中四舍五入到最近的可用时间段

Question

我已经为此苦苦挣扎了一个小时左右，却一无所获。基本上我需要将当前时间加上 30 分钟，然后四舍五入到下一个 15 分钟。

例子:

• 如果现在是 20:00，则结果 = 20:45
• 如果现在是 20:10，结果 = 20:45
• 如果现在是 20:16，结果 = 21:00
• 如果现在是 20:35，结果 = 21:15

我的 PHP 生锈了，我一直在混淆日期添加和舍入方法，试图让它工作，我知道这很简单 - 只是没有想法!

谢谢

Answer 1

我也会添加一个解决方案:

<?php

date_default_timezone_set('America/Los_Angeles');

$times = array();
$times[] = strtotime('00:07');
$times[] = strtotime('04:21');
$times[] = strtotime('20:00');
$times[] = strtotime('20:10');
$times[] = strtotime('20:16');
$times[] = strtotime('20:35');
$times[] = strtotime('23:15');


foreach($times as $time) {
    echo date('m-d-Y H:i', $time) . ' becomes ' . date('m-d-Y H:i:s', roundToNearestInterval($time)) . "<br />\n";
}


function roundToNearestInterval($timestamp)
{
    $timestamp += 60 * 30;
    list($m, $d, $y, $h, $i, $s) = explode(' ', date('m d Y H i s', $timestamp));
    if ($s != 0) $s = 0;

    if ($i < 15) {
        $i = 15;
    } else if ($i < 30) {
        $i = 30;
    } else if ($i < 45) {
        $i = 45;
    } else if ($i < 60) {
        $i = 0;
        $h++;
    }

    return mktime($h, $i, $s, $m, $d, $y);
}

产量:

03-01-2012 00:07 becomes 03-01-2012 00:45:00
03-01-2012 04:21 becomes 03-01-2012 05:00:00
03-01-2012 20:00 becomes 03-01-2012 20:45:00
03-01-2012 20:10 becomes 03-01-2012 20:45:00
03-01-2012 20:16 becomes 03-01-2012 21:00:00
03-01-2012 20:35 becomes 03-01-2012 21:15:00
03-01-2012 23:15 becomes 03-02-2012 00:00:00