圆形分钟到最近的一刻钟

Question

我需要在PHP中将时间缩短到最接近的四分之一小时.时间从日期时间列中的MySQL数据库中提取并格式化为2010-03-18 10:50:00.

例:

• 10:50需要10:45
• 1:12需要是1点
• 3:28需要3:15
• 等等

我假设floor()参与但不确定如何去做.

谢谢

Answer 1

$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舍入时间.

PS:如果你想要将它取下来替换round()为floor().

Answer 2

你的全部功能将是这样的......

function roundToQuarterHour($timestring) {
    $minutes = date('i', strtotime($timestring));
    return $minutes - ($minutes % 15);
}

Answer 3

$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;

Answer 4

要使用最接近的四分之一小时,请使

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

01:08成为01:15

Answer 5

$minutes = ($minutes - ($minutes % 15));

Answer 6

最近我喜欢解决TDD /单元测试方式的问题.我最近不再编程PHP了,但这就是我想出来的.说实话,我实际上看了这里的代码示例,并选择了我认为已经正确的代码示例.接下来,我想通过使用您在上面提供的测试进行单元测试来验证这一点.

class TimeTest

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)

Answer 7

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

/**
 * 
 * @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));
}