如何以半小时的间隔进行一次数组？

Question

我在阵列中需要一个像这样的列表......

12am
12:30am
1:00pm
...

我怎么能用PHP做到这一点？

Answer 1

这是Alex的功能的改进版本,它使用秒来获得更高的精度:

function hoursRange( $lower = 0, $upper = 86400, $step = 3600, $format = '' ) {
    $times = array();

    if ( empty( $format ) ) {
        $format = 'g:i a';
    }

    foreach ( range( $lower, $upper, $step ) as $increment ) {
        $increment = gmdate( 'H:i', $increment );

        list( $hour, $minutes ) = explode( ':', $increment );

        $date = new DateTime( $hour . ':' . $minutes );

        $times[(string) $increment] = $date->format( $format );
    }

    return $times;
}

因此,要在24小时内制作一个时间间隔为1小时的数组,请使用默认值:

hoursRange();

哪个会给你以下内容:

Array
(
    [00:00] => 12:00 am
    [01:00] => 1:00 am
    [02:00] => 2:00 am
    [03:00] => 3:00 am
    [04:00] => 4:00 am
    [05:00] => 5:00 am
    [06:00] => 6:00 am
    [07:00] => 7:00 am
    [08:00] => 8:00 am
    [09:00] => 9:00 am
    [10:00] => 10:00 am
    [11:00] => 11:00 am
    [12:00] => 12:00 pm
    [13:00] => 1:00 pm
    [14:00] => 2:00 pm
    [15:00] => 3:00 pm
    [16:00] => 4:00 pm
    [17:00] => 5:00 pm
    [18:00] => 6:00 pm
    [19:00] => 7:00 pm
    [20:00] => 8:00 pm
    [21:00] => 9:00 pm
    [22:00] => 10:00 pm
    [23:00] => 11:00 pm
)

以下是一些示例用法:

// Every 15 Minutes, All Day Long
$range = hoursRange( 0, 86400, 60 * 15 );

// Every 30 Minutes from 8 AM - 5 PM, using Custom Time Format
$range = hoursRange( 28800, 61200, 60 * 30, 'h:i a' );

您可以在CodePad上查看工作代码段.

Answer 2

谢谢你重新打开亚历克斯的问题.

这是一个应该与功能程序员产生共鸣的解决方案.

function halfHourTimes() {
  $formatter = function ($time) {
    if ($time % 3600 == 0) {
      return date('ga', $time);
    } else {
      return date('g:ia', $time);
    }
  };
  $halfHourSteps = range(0, 47*1800, 1800);
  return array_map($formatter, $halfHourSteps);
}

Answer 3

我觉得这个更好:)

function hoursRange($lower = 0, $upper = 23, $step = 1, $format = NULL) {

    if ($format === NULL) {
        $format = 'g:ia'; // 9:30pm
    }
    $times = array();
    foreach(range($lower, $upper, $step) as $increment) {
        $increment = number_format($increment, 2);
        list($hour, $minutes) = explode('.', $increment);
        $date = new DateTime($hour . ':' . $minutes * .6);
        $times[(string) $increment] = $date->format($format);
    }
    return $times;
}