在tp6中，使用redis 缓存列表。

<?php

namespace app\api\controller\Test;

use app\api\controller\Common;
use think\facade\Cache;

class Jim extends Common
{
    public function getSubjectsByIds()
    {
        $ids = [1, 2, 22,33,44,3, 4, 5];
        $cacheKeyPrefix = $this->getRedisKey('shopProductList');

        $cached = [];
        $missIds = [];

        $cacheKeys = array_map(fn($id) => $cacheKeyPrefix . $id, $ids);

        $cacheData = Cache::store('redis')->mget($cacheKeys);

        $cacheData = array_combine($cacheKeys, $cacheData); // ✅ 修复这里

        dump($cacheData);

        foreach ($ids as $i => $id) {
            $key = $cacheKeys[$i];
            $item = $cacheData[$key] ?? null;

            if ($item) {
                $cached[$id] = is_array($item) ? $item : json_decode($item, true);
            } else {
                $missIds[] = $id;
            }
        }
        dump($missIds);
        if (!empty($missIds)) {

            $dbList = [
                ['id'=>1, 'name'=>'Product 1'],
                ['id'=>2, 'name'=>'Product 2'],
                ['id'=>3, 'name'=>'Product 3'],
                ['id'=>4, 'name'=>'Product 4'],
                ['id'=>5, 'name'=>'Product 5'],
            ];

            foreach ($dbList as $item) {
                $key = $cacheKeyPrefix . $item['id'];
                Cache::store('redis')->set($key, json_encode($item), 60);
                $cached[$item['id']] = $item;
            }
//            dd($missIds);
        }

        $result = [];
        foreach ($ids as $id) {
            if (isset($cached[$id])) {
                $result[] = $cached[$id];
            }
        }

        dd($result);
    }

    public function getRedisKey(string $prefix, $suffix = ''): string
    {
        $app = config('app.app_name') ?? 'app';
        $env = config('app.env') ?? 'prod';
        $key = "{$app}:{$env}:{$prefix}";

        if (!empty($suffix)) {
            if (is_array($suffix)) {
                $suffix = implode("_", $suffix);
            }
            $key .= ":{$suffix}";
        }

        return $key;
    }
}

直接可用代码

<?php

namespace app\api\service;

use think\facade\Cache;

class ProductCacheService
{
    /**
     * 获取产品数据（先查缓存，缓存缺失则查库并更新）
     * @param array $ids 产品 ID 列表
     * @return array 产品数据
     */
    public function getProductsByIds(array $ids): array
    {
        $cacheKeyPrefix = $this->getRedisKey('shopProductList');

        $cached = [];
        $missIds = [];

        $cacheKeys = array_map(fn($id) => $cacheKeyPrefix . $id, $ids);
        $cacheData = Cache::store('redis')->mget($cacheKeys);

        if ($cacheData) {
            foreach ($ids as $i => $id) {
                $key = $cacheKeys[$i];
                $item = $cacheData[$i] ?? null;
                if ($item) {
                    $cached[$id] = is_array($item) ? $item : json_decode($item, true);
                } else {
                    $missIds[] = $id;
                }
            }
        }

        // 模拟数据库查询
        if (!empty($missIds)) {
            $dbList = [
                ['id' => 1, 'name' => 'Product 1'],
                ['id' => 2, 'name' => 'Product 2'],
                ['id' => 3, 'name' => 'Product 3'],
                ['id' => 4, 'name' => 'Product 4'],
                ['id' => 5, 'name' => 'Product 5'],
            ];

            foreach ($dbList as $item) {
                if (in_array($item['id'], $missIds)) {
                    $key = $cacheKeyPrefix . $item['id'];
                    Cache::store('redis')->set($key, json_encode($item), 60);
                    $cached[$item['id']] = $item;
                }
            }
        }

        return array_values($cached);
    }

    /**
     * 获取 Redis 缓存键
     * @param string $prefix 前缀
     * @param mixed $suffix 后缀
     * @return string 缓存键
     */
    private function getRedisKey(string $prefix, $suffix = ''): string
    {
        $app = config('app.app_name') ?? 'app';
        $env = config('app.env') ?? 'prod';
        $key = "{$app}:{$env}:{$prefix}";

        if (!empty($suffix)) {
            if (is_array($suffix)) {
                $suffix = implode("_", $suffix);
            }
            $key .= ":{$suffix}";
        }

        return $key;
    }
}