Laravel API嵌套数据遍历报错：foreach参数类型不符问题求助

从API获取产品数据，返回结果包含两层嵌套的data结构。使用foreach遍历能部分列出产品，但无法正确访问单个元素，执行Laravel代码时抛出异常：

ErrorException : foreach() argument must be of type array|object, int given

API返回结构：

{
    "data": {
        "data": [
            {
                "id": 101553,
                "company_id": 730,
                "category_id": 132288,
                "brand_id": 39549,
                "name": "Hh PRODUCT TEST",
                "remote_category_id": "scarf",
                "remote_brand_id": "bershka123",
                "spu": "zb3940823904"
            },
            {
                "id": 101554,
                "company_id": 730,
                "category_id": 132289,
                "brand_id": 39549,
                "name": "Hs PRODUCT TEST",
                "remote_category_id": "scarf",
                "remote_brand_id": "bershka123",
                "spu": "zb3940823905"
            }
        ],
        "count": 175,
        "search": {
            "category_id": null,
            "brand_id": null,
            "company_id": null
        },
        "start": 0,
        "length": 10
    },
    "error_code": 0,
    "message": ""
}

Model代码：

public function getProducts($start =0, $length =10, $category_id =null, $brand_id=null, $spu=null, $name=null, $is_active=null, $id=null, $remote_brand_id = null, $remote_category_id=null)
{
    $request = Http::withHeaders([
        'Authorization' => 'Bearer '.$this->jwttoken,
        'Content-Type' => 'application/json'
    ])->post($this->sandbox . 'products/search',[
        "start" => $start,
        "length" => $length,
        "search" => [
            "category_id" => $category_id,
            "brand_id" => $brand_id,
            "spu" => $spu,
            "name" => $name,
            "is_active" => $is_active,
            "id" => $id,
            "remote_brand_id" => $remote_brand_id,
            "remote_category_id" => $remote_category_id
        ]
    ])->json();
    return $request;
}

Controller代码：

$company_id = 100;
$products = (new Client($company_id))->getProducts();
foreach($products as $product){
    foreach($product as $prd){
        dump($prd);
    }
}

Controller代码遍历层级错误：

1. $products是API返回的完整数组，包含data、error_code、message三个键
2. 第一层foreach($products as $product)会依次遍历这三个键对应的value：
   • 第一个value是data对应的嵌套对象（包含内层data数组、count等）
   • 第二个value是error_code对应的整数0
3. 当遍历到error_code时，第二层foreach($product as $prd)试图对整数执行遍历操作，直接触发类型错误。

直接定位到第二层data数组（即实际的产品列表）再进行遍历：

修改后的Controller代码：

$company_id = 100;
$response = (new Client($company_id))->getProducts();
// 先判断API返回正常，再拿到产品列表
if ($response['error_code'] === 0 && isset($response['data']['data'])) {
    $products = $response['data']['data'];
    // 遍历产品列表
    foreach($products as $product){
        // 访问单个产品元素
        dump($product['id']);
        dump($product['name']);
        dump($product['spu']);
        // 或者直接打印整个产品
        // dump($product);
    }
}

额外优化建议 #

可以在Model的getProducts方法里直接返回内层的产品数组，简化Controller逻辑：

// Model中修改返回逻辑
public function getProducts(...)
{
    $request = Http::...->json();
    // 直接返回产品列表，异常情况返回空数组
    if ($request['error_code'] === 0) {
        return $request['data']['data'];
    }
    return [];
}

// Controller中直接使用
$products = (new Client($company_id))->getProducts();
foreach($products as $product){
    // 处理产品
}

内容的提问来源于stack exchange，提问作者Ontrable