使用php从json中的嵌套数组获取数据

Question

我有来自 url feed 的 json。下面是一个示例。我没有正确执行 foreach 循环是问题所在{    "useLive": true,    "models": [        {            "snapshotUrl": "https://img-eu.whatevercdn.com/eu7/previews/1537971705/5293074",            "widgetPreviewUrl": "https://img-eu.whatevercdn.com/eu7/previews/1537971705/5293074",            "id": 5293074,            "country": "",            "gender": "female",            "isNew": false,            "previewUrl": "https://st.whatevercdn.com/cdn/previews/b/a/a/baa515a42e75d80b0dc1e7a75bf4ea0f-full",            "previewUrlThumbBig": "https://st.whatevercdn.com/cdn/previews/b/a/a/baa515a42e75d80b0dc1e7a75bf4ea0f-thumb-big",            "previewUrlThumbSmall": "https://st.whatevercdn.com/cdn/previews/b/a/a/baa515a42e75d80b0dc1e7a75bf4ea0f-thumb-small",            "broadcastGender": "female",            "snapshotServer": "eu7",            "tags": ["autoTagPopular","keyword","keyword2"],            "topBestPlace": 0,            "username": "model1",            "languages": ["en"],            "stripScore": 998.5,            "token": "93021860dbebd5ba27e604f6b4b93754"        },        {            "snapshotUrl": "https://img-eu.whatevercdn.com/eu8/previews/1537971700/6492104",            "widgetPreviewUrl": "https://img-eu.whatevercdn.com/eu8/previews/1537971700/6492104",            "id": 6492104,            "country": "",            "gender": "female",            "isNew": false,            "previewUrl": "https://st.whatevercdn.com/cdn/previews/2/b/3/2b366955f5a66d73ee038d43bf77c99b-full",            "previewUrlThumbBig": "https://st.whatevercdn.com/cdn/previews/2/b/3/2b366955f5a66d73ee038d43bf77c99b-thumb-big",            "previewUrlThumbSmall": "https://st.whatevercdn.com/cdn/previews/2/b/3/2b366955f5a66d73ee038d43bf77c99b-thumb-small",        }    ],我只收到第一个用户名，然后收到错误消息。警告：/whatever 中的非法字符串偏移量“用户名”有人能帮忙吗？

Answer 1

您应该在 foreach 中使用 $performers['models'] 数组，然后获取用户名它将正常工作尝试以下代码

$performers = json_decode($data, true); 

if(isset($performers['models'])){   

    foreach ($performers['models'] as $performer) {

        $info = (isset($performer["username"])) ? $performer["username"] : '';

        echo $info;

        echo "<br>";

    }   

}

输出

model1

model2