php函数将数组分成3部分而不留下余数

Question

我有一个简单的数组，我想将它分成 3 个随机行。

到目前为止，我使用的数组块函数成功地将其拆分为 3 行，但由于数组计数不均匀，它将数组拆分为 3 行，但在 2 行中留下剩余的 4th 值。看下面的代码...

<?php

  $my_bikes = array (
    'bike-996.png',
    'bike-adventure.png',
    'bike-bandit.png',
    'bike-blade.png',
    'bike-classic-racer.png',
    'bike-classic-rm.png',
    'bike-custom.png',
    'bike-dragster.png',
    'bike-ducati-scrambler.png',
    'bike-electric-concept.png',
    'bike-flat-tracker.png',
    'bike-goldwing.png',
    'bike-gsx.png',
    'bike-harley.png',
    'bike-indian-vintage.png',
    'bike-kiddimoto.png',
    'bike-livewire.png',
    'bike-lotus.png',
    'bike-monkey-bike.png',
    'bike-moto3.png',
    'bike-mx.png',
    'bike-rc.png',
    'bike-rc213v.png',
    'bike-roland-sands.png',
    'bike-scooter.png',
    'bike-speedway.png',
    'bike-tron.png',
    'bike-vespa.png',
    'bike-vision.png',
  );

  shuffle($my_bikes);

  // chunk my bike
  $my_bikes = array_chunk($my_bikes, count($my_bikes) / 3);

?>

<?php foreach($my_bikes as $key => $my_bike_row) : ?>

  <div class="row <?=$key % 2==0 ? 'left' : 'right' ?>">
    <?php foreach($my_bike_row as $my_bike): ?>
      <img src="<?=get_path('images/bikes/' . $my_bike)?>" alt="">
    <?php endforeach; ?>
  </div>

<?php endforeach; ?>

<?=exit( '<pre>' . print_r( $my_bikes, true ));?>

在下面查看我当前的输出...

Array
(
    [0] => Array
        (
            [0] => bike-roland-sands.png
            [1] => bike-monkey-bike.png
            [2] => bike-classic-rm.png
            [3] => bike-classic-racer.png
            [4] => bike-vespa.png
            [5] => bike-rc213v.png
            [6] => bike-flat-tracker.png
            [7] => bike-dragster.png
            [8] => bike-custom.png
        )

    [1] => Array
        (
            [0] => bike-speedway.png
            [1] => bike-blade.png
            [2] => bike-tron.png
            [3] => bike-indian-vintage.png
            [4] => bike-harley.png
            [5] => bike-goldwing.png
            [6] => bike-kiddimoto.png
            [7] => bike-livewire.png
            [8] => bike-moto3.png
        )

    [2] => Array
        (
            [0] => bike-adventure.png
            [1] => bike-mx.png
            [2] => bike-rc.png
            [3] => bike-scooter.png
            [4] => bike-996.png
            [5] => bike-gsx.png
            [6] => bike-ducati-scrambler.png
            [7] => bike-lotus.png
            [8] => bike-electric-concept.png
        )

    [3] => Array
        (
            [0] => bike-vision.png
            [1] => bike-bandit.png
        )

)

如您所见，我只剩下 4 行。

我的问题是，PHP 有什么方法可以将数组拆分为 3 行，但是如果它是奇数(根据我的示例)，则最后的余数包含在 3 行中，而不是剩下的。

理想情况下，我不想有任何重复。

谢谢

Answer 1

使用 array_chunk()
并通过 ceil(count($my_bikes)/3) 将分数(如果有)四舍五入到下一个最高整数值来计算大小

所以在这种情况下 - count($my_bikes)/3 => 26/3 => 8.66 。
ceil(8.66) => 9
块大小将为 9, 9, 8

array_chunk($my_bikes, (ceil(count($my_bikes)/3)))