58

我需要将时间四舍五入到 PHP 中最近的一刻钟。时间从 MySQL 数据库中的 datetime 列中提取,并格式化为2010-03-18 10:50:00.

例子:

  • 10:50 必须是 10:45
  • 1:12 必须是 1:00
  • 3:28 必须是 3:15
  • 等等

我假设floor()参与其中,但不知道如何去做。

谢谢

4

17 回答 17

76
$seconds = time();
$rounded_seconds = round($seconds / (15 * 60)) * (15 * 60);

echo "Original: " . date('H:i', $seconds) . "\n";
echo "Rounded: " . date('H:i', $rounded_seconds) . "\n";

此示例获取当前时间并将其四舍五入到最接近的四分之一,并打印原始时间和四舍五入的时间。

PS:如果要四舍五入,替换round()floor().

于 2010-03-19T21:26:38.853 回答
36

你的全部功能将是这样的......

function roundToQuarterHour($timestring) {
    $minutes = date('i', strtotime($timestring));
    return $minutes - ($minutes % 15);
}
于 2010-03-19T21:27:00.970 回答
12
$now = getdate();
$minutes = $now['minutes'] - $now['minutes']%15;

 //Can add this to go to the nearest 15min interval (up or down)
  $rmin  = $now['minutes']%15;
  if ($rmin > 7){
    $minutes = $now['minutes'] + (15-$rmin);
   }else{
      $minutes = $now['minutes'] - $rmin;
  }

$rounded = $now['hours'].":".$minutes;
echo $rounded;
于 2010-03-19T21:23:12.713 回答
9

要舍入最近的一刻钟,请使用以下代码

<?php
$time = strtotime("01:08");
echo $time.'<br />';
$round = 15*60;
$rounded = round($time / $round) * $round;
echo date("H:i", $rounded);
?>

01:08 变成 01:15

于 2013-08-23T05:08:26.333 回答
6
$minutes = ($minutes - ($minutes % 15));
于 2010-03-19T21:17:34.207 回答
6

最近我喜欢用TDD/单元测试的方式来解决问题。最近我不再编写太多 PHP 了,但这就是我想出的。老实说,我实际上查看了这里的代码示例,并选择了一个我认为已经正确的示例。接下来,我想使用您上面提供的测试通过单元测试来验证这一点。

类时间测试

require_once 'PHPUnit/Framework.php';
require_once 'Time.php';

class TimeTest extends PHPUnit_Framework_TestCase 
{
    protected $time;

    protected function setUp() {
        $this->time = new Time(10, 50);
    }

    public function testConstructingTime() {
        $this->assertEquals("10:50", $this->time->getTime());
        $this->assertEquals("10", $this->time->getHours());
        $this->assertEquals("50", $this->time->getMinutes());        
    }

    public function testCreatingTimeFromString() {
        $myTime = Time::create("10:50");
        $this->assertEquals("10", $myTime->getHours());
        $this->assertEquals("50", $myTime->getMinutes());
    }

    public function testComparingTimes() {
        $timeEquals     = new Time(10, 50);
        $this->assertTrue($this->time->equals($timeEquals));
        $timeNotEquals  = new Time(10, 44);
        $this->assertFalse($this->time->equals($timeNotEquals));
    }


    public function testRoundingTimes()
    {
        // Round test time.
        $roundedTime = $this->time->round();
        $this->assertEquals("10", $roundedTime->getHours());
        $this->assertEquals("45", $roundedTime->getMinutes());

        // Test some more times.
        $timesToTest = array(
            array(new Time(1,00), new Time(1,12)),
            array(new Time(3,15), new Time(3,28)),
            array(new Time(1,00), new Time(1,12)),
        );

        foreach($timesToTest as $timeToTest) {
            $this->assertTrue($timeToTest[0]->equals($timeToTest[0]->round()));
        }        
    }
}

上课时间

<?php

class Time
{
    private $hours;
    private $minutes;

    public static function create($timestr) {
        $hours      = date('g', strtotime($timestr));
        $minutes    = date('i', strtotime($timestr));
        return new Time($hours, $minutes);
    }

    public function __construct($hours, $minutes) {
        $this->hours    = $hours;
        $this->minutes  = $minutes;
    }

    public function equals(Time $time) {
        return  $this->hours == $time->getHours() &&
                 $this->minutes == $time->getMinutes();
    }

    public function round() {
        $roundedMinutes = $this->minutes - ($this->minutes % 15);
        return new Time($this->hours, $roundedMinutes);
    }

    public function getTime() {
        return $this->hours . ":" . $this->minutes;
    }

    public function getHours() {
        return $this->hours;
    }

    public function getMinutes() {
        return $this->minutes;
    }
}

运行测试

alfred@alfred-laptop:~/htdocs/time$ phpunit TimeTest.php 
PHPUnit 3.3.17 by Sebastian Bergmann.

....

Time: 0 seconds

OK (4 tests, 12 assertions)
于 2010-03-19T22:36:25.190 回答
4

这是一个老问题,但最近我自己实现了我会分享我的解决方案:-

public function roundToQuarterHour($datetime) {

    $datetime = ($datetime instanceof DateTime) ? $datetime : new DateTime($datetime);

    return $datetime->setTime($datetime->format('H'), ($i = $datetime->format('i')) - ($i % 15));

}

public function someQuarterHourEvent() {

    print_r($this->roundToQuarterHour(new DateTime()));
    print_r($this->roundToQuarterHour('2016-10-19 10:50:00'));
    print_r($this->roundToQuarterHour('2016-10-19 13:12:00'));
    print_r($this->roundToQuarterHour('2016-10-19 15:28:00'));

}
于 2016-10-18T23:23:49.537 回答
3

我很惊讶没有人提到令人惊叹的Carbon 库(在 Laravel 中经常使用)。

/**
 * 
 * @param \Carbon\Carbon $now
 * @param int $minutesChunk
 * @return \Carbon\Carbon
 */
public static function getNearestTimeRoundedDown($now, $minutesChunk = 30) {
    $newMinute = $now->minute - ($now->minute % $minutesChunk); 
    return $now->minute($newMinute)->startOfMinute(); //https://carbon.nesbot.com/docs/
}

测试用例:

public function testGetNearestTimeRoundedDown() {
    $this->assertEquals('2018-07-06 14:00:00', TT::getNearestTimeRoundedDown(Carbon::parse('2018-07-06 14:12:59'))->format(TT::MYSQL_DATETIME_FORMAT));
    $this->assertEquals('14:00:00', TT::getNearestTimeRoundedDown(Carbon::parse('2018-07-06 14:29:25'))->format(TT::HOUR_MIN_SEC_FORMAT));
    $this->assertEquals('14:30:00', TT::getNearestTimeRoundedDown(Carbon::parse('2018-07-06 14:30:01'))->format(TT::HOUR_MIN_SEC_FORMAT));
    $this->assertEquals('18:00:00', TT::getNearestTimeRoundedDown(Carbon::parse('2019-07-06 18:05:00'))->format(TT::HOUR_MIN_SEC_FORMAT));
    $this->assertEquals('18:45:00', TT::getNearestTimeRoundedDown(Carbon::parse('2019-07-06 18:50:59'), 15)->format(TT::HOUR_MIN_SEC_FORMAT));
    $this->assertEquals('18:45:00', TT::getNearestTimeRoundedDown(Carbon::parse('2019-07-06 18:49:59'), 15)->format(TT::HOUR_MIN_SEC_FORMAT));
    $this->assertEquals('10:15:00', TT::getNearestTimeRoundedDown(Carbon::parse('1999-12-30 10:16:58'), 15)->format(TT::HOUR_MIN_SEC_FORMAT));
    $this->assertEquals('10:10:00', TT::getNearestTimeRoundedDown(Carbon::parse('1999-12-30 10:16:58'), 10)->format(TT::HOUR_MIN_SEC_FORMAT));
}
于 2019-04-12T20:44:46.890 回答
2

对于我的系统,我想添加计划在我的服务器上每 5 分钟运行一次的作业,并且我希望在接下来的第 5 分钟块中运行相同的作业,然后是 15、30、60、120、240 分钟、1 天和2 天后,这就是这个函数计算的结果

function calculateJobTimes() {
    $now = time();
    IF($now %300) {
        $lastTime = $now - ($now % 300);
    }
    ELSE {
        $lastTime = $now;
    }
    $next[] = $lastTime + 300;
    $next[] = $lastTime + 900;
    $next[] = $lastTime + 1800;
    $next[] = $lastTime + 3600;
    $next[] = $lastTime + 7200;
    $next[] = $lastTime + 14400;
    $next[] = $lastTime + 86400;
    $next[] = $lastTime + 172800;
    return $next;
}

echo "The time now is ".date("Y-m-d H:i:s")."<br />
Jobs will be scheduled to run at the following times:<br /><br />
<ul>";
foreach(calculateJobTimes() as $jTime) {
    echo "<li>".date("Y-m-d H:i:s", $jTime).'</li>';
}
echo '</ul>';
于 2011-05-29T15:41:11.547 回答
2

使用内置 PHP 函数进行舍入时间以考虑日期和时间是很重要的。例如2020-10-09 23:37:35需要2020-10-10 00:00:00在四舍五入到最接近的小时时变为。

循环时间到最近的时间

$time = '2020-10-09 23:37:35';

$time = date("Y-m-d H:i:s", round(strtotime($time) / 3600) * 3600); // 2020-10-10 00:00:00

$time = '2020-10-09 23:15:35';

$time = date("Y-m-d H:i:s", round(strtotime($time) / 3600) * 3600); // 2020-10-09 23:00:00

将时间向下舍入到最近的 15 分钟增量

$time = '2020-10-09 23:15:35';

$time = date("Y-m-d H:i:s", floor(strtotime($time) / (60*15))*(60*15)); // 2020-10-09 23:15:00

$time = '2020-10-09 23:41:35';

$time = date("Y-m-d H:i:s", floor(strtotime($time) / (60*15))*(60*15)); // 2020-10-09 23:30:00

如果您需要四舍五入到最接近的 15 分钟增量,请更改floorceil例如

$time = date("Y-m-d H:i:s", ceil(strtotime($time) / (60*15))*(60*15)); // 2020-10-09 23:45:00

如果您需要将时间四舍五入到另一分钟增量,您可以简单地执行以下操作:

$time = date("Y-m-d H:i:s", ceil(strtotime($time) / (60*20))*(60*20)); // 2020-10-10 00:00:00
于 2020-10-19T14:16:59.557 回答
1

我需要一种方法来结束这一天,并切断除此之外的所有内容:

$explodedDate = explode("T", gmdate("c",strtotime("now")));
$expireNowDate =  date_create($explodedDate[0]);

strtotime 给了我“现在”的时间戳,gmdate 将其转换为 ISO 格式(类似于“2012-06-05T04:00:00+00:00”),然后我在“T”处使用爆炸,给我“ 2012-06-05" 在 $explodedDate 的第零个索引中,然后将其传递到 date_create 以获取日期对象。

不确定是否所有这些都是必要的,但这似乎比通过并减去秒、分钟、小时等的工作要少得多。

于 2011-12-08T14:10:20.940 回答
1
// time = '16:58'
// type = auto, up, down
function round_time( $time, $round_to_minutes = 5, $type = 'auto' ) {
    $round = array( 'auto' => 'round', 'up' => 'ceil', 'down' => 'floor' );
    $round = @$round[ $type ] ? $round[ $type ] : 'round';
    $seconds = $round_to_minutes * 60;
    return date( 'H:i', $round( strtotime( $time ) / $seconds ) * $seconds );
}
于 2016-01-03T21:43:50.090 回答
1

简单的解决方案:

$oldDate = "2010-03-18 10:50:00";
$date = date("Y-m-d H:i:s", floor(strtotime($oldDate) / 15 / 60) * 15 * 60);

如果您想四舍五入,您可以更改floor为。ceil

于 2016-07-27T09:34:57.293 回答
0

我编写了一个函数,可以将时间戳四舍五入到秒或分钟。

我可能不是最高效的方式,但我认为 PHP 并不关心一些简单的循环。

在您的情况下,您只需像这样传递您的 MySQL 日期时间:

<?php echo date('d/m/Y - H:i:s', roundTime(strtotime($MysqlDateTime), 'i', 15)); ?>

返回:最接近的四舍五入值(上下查找!)

功能:

<?php
function roundTime($time, $entity = 'i', $value = 15){

    // prevent big loops
    if(strpos('is', $entity) === false){
        return $time;
    }

    // up down counters
    $loopsUp = $loopsDown = 0;

    // loop up
    $loop = $time;
    while(date($entity, $loop) % $value != 0){
        $loopsUp++;
        $loop++;
    }
    $return = $loop;    


    // loop down
    $loop = $time;
    while(date($entity, $loop) % $value != 0){
        $loopsDown++;
        $loop--;
        if($loopsDown > $loopsUp){
            $loop = $return;
            break;  
        }
    }
    $return = $loop;

    // round seconds down
    if($entity == 'i' && date('s', $return) != 0){
        while(intval(date('s', $return)) != 0){
            $return--;
        }
    }
    return $return;
}
?>

如果您想向上或向下舍入到秒,您只需将 $entity 替换为“s”,然后将 15 替换为您想要向上或向下舍入的秒数或分钟数。

于 2012-12-05T13:55:42.887 回答
0

这是我目前正在使用的功能:

/**
 * Rounds a timestamp
 *
 * @param int $input current timestamp
 * @param int $round_to_minutes rounds to this minute
 * @param string $type auto, ceil, floor
 * @return int rounded timestamp
 */
static function roundToClosestMinute($input = 0, $round_to_minutes = 5, $type = 'auto')
{
    $now = !$input ? time() : (int)$input;

    $seconds = $round_to_minutes * 60;
    $floored = $seconds * floor($now / $seconds);
    $ceiled = $seconds * ceil($now / $seconds);

    switch ($type) {
        default:
            $rounded = ($now - $floored < $ceiled - $now) ? $floored : $ceiled;
            break;

        case 'ceil':
            $rounded = $ceiled;
            break;

        case 'floor':
            $rounded = $floored;
            break;
    }

    return $rounded ? $rounded : $input;
}

希望它可以帮助某人:)

于 2013-06-18T15:58:27.677 回答
0

可能会帮助别人。对于任何语言。

roundedMinutes = yourRoundFun(Minutes / interval) * interval.

例如,间隔可以是 5 分钟、10 分钟、15 分钟、30 分钟。然后可以将四舍五入的分钟重置为相应的日期。

yourDateObj.setMinutes(0) 
yourDateObj.setMinutes(roundedMinutes)
于 2015-10-03T18:37:45.967 回答
-1

虽然通常最适合使用基于日期时间的函数来操作日期时间,但此任务的要求不涉及任何与时间相关的特殊处理——它是对特定子字符串执行计算并使用数学结果替换子字符串。

不是每个人都喜欢正则表达式,但它确实提供了一种单一功能的技术来改变输入字符串。

代码:(演示

$timeString = "2010-03-18 10:50:57";
// PHP7.4+ arrow syntax
echo preg_replace_callback(
        '~:\K(\d{2}).*~',
        fn($m) => $m[1] - $m[1] % 15 . ':00',
        $timeString
     );

echo "\n---\n";
// below PHP7.3
echo preg_replace_callback(
        '~:\K(\d{2}).*~',
        function($m) {return $m[1] - $m[1] % 15 . ':00';},
        $timeString
     );

输出:

2010-03-18 10:45:00
---
2010-03-18 10:45:00

请注意,如果处理仅时间(冒号分隔)的字符串,此正则表达式模式也可以正常工作。(演示

于 2019-09-19T12:48:49.910 回答