在 Laravel 6 中，操作多维数组时，使用引用传递以精简代码实现

1、现有的代码实现如下

<?php

use Illuminate\Support\Arr;

if (Arr::has($schema, 'sections')) {
    foreach ($schema['sections'] as $sectionKey => $section) {
        foreach ($section['blocks'] as $blockKey => $block) {
            if ($block['type'] == 'internal/size-chart/blocks/size-chart') {
                Arr::forget($schema, 'sections.' . $sectionKey . '.blocks.' . $blockKey);
                $blockOrderKey = array_search($blockKey, $section['block_order']);
                if ($blockOrderKey !== false) {
                    Arr::forget($schema, 'sections.' . $sectionKey . '.block_order.' . $blockOrderKey);
                }
            }
        }
        Arr::set($schema, 'sections.' . $sectionKey . '.block_order', array_values(Arr::get($schema, 'sections.' . $sectionKey . '.block_order')));
    }
}

return $schema;

2、使用引用传递以精简代码实现，可将 Arr::forget($schema, ‘sections.’ . $sectionKey . ‘.blocks.’ . $blockKey); 替换为：Arr::forget($section, ‘blocks.’ . $blockKey);

<?php

use Illuminate\Support\Arr;

if (Arr::has($schema, 'sections')) {
    foreach ($schema['sections'] as $sectionKey => &$section) {
        foreach ($section['blocks'] as $blockKey => $block) {
            if ($block['type'] == 'internal/size-chart/blocks/size-chart') {
                Arr::forget($section, 'blocks.' . $blockKey);
                $blockOrderKey = array_search($blockKey, $section['block_order']);
                if ($blockOrderKey !== false) {
                    Arr::forget($section, 'block_order.' . $blockOrderKey);
                }
            }
        }
        Arr::set($section, 'block_order', array_values(Arr::get($section, 'block_order')));
    }
}

return $schema;