Custom Key Sorting in Laravel Collections

Laravel's sortKeysUsing method provides granular control over how set keys are sorted, allowing you to implement custom sorting logic beyond standard alphabetical order.

This feature is especially valuable when processing configuration file arrays, form fields with a specific display order, or any associated data where key sequences are important for processing or display.

$collection->sortKeysUsing('strnatcasecmp');

// 或

$collection->sortKeysUsing(function ($a, $b) {
    return $a <=> $b;
});

The following is an example of how to implement priority menu sorting:

<?php namespace App\Services;

use Illuminate\Support\Collection;

class NavigationManager
{
    public function getOrderedNavigation(array $menuItems): Collection
    {
        return collect($menuItems)
            ->sortKeysUsing(function ($a, $b) {
                // 提取位置前缀 (pos1_、pos2_ 等)
                $positionA = $this->extractPosition($a);
                $positionB = $this->extractPosition($b);

                // 如果两者都有位置前缀，则按数字排序
                if ($positionA !== null && $positionB !== null) {
                    return $positionA <=> $positionB;
                }

                // 位置前缀在无前缀键之前
                if ($positionA !== null) return -1;
                if ($positionB !== null) return 1;

                // 按部分分组项目
                $sectionA = explode('_', $a)[0];
                $sectionB = explode('_', $b)[0];

                if ($sectionA !== $sectionB) {
                    // 自定义部分顺序
                    $sections = ['dashboard', 'users', 'content', 'settings'];
                    $indexA = array_search($sectionA, $sections);
                    $indexB = array_search($sectionB, $sections);

                    if ($indexA !== false && $indexB !== false) {
                        return $indexA <=> $indexB;
                    }
                }

                // 默认情况下使用自然不区分大小写的排序
                return strnatcasecmp($a, $b);
            });
    }

    private function extractPosition(string $key): ?int
    {
        if (preg_match('/^pos(\d+)_/', $key, $matches)) {
            return (int) $matches[1];
        }

        return null;
    }
}

The

sortKeysUsing method changes how you arrange collection data and can be sorted semantically according to the specific needs of your application.

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