Question

这是nutrionix json ouput

  <?php 
    $json = '{
        "total": 3,
        "max_score": 2.2296956,
        "hits": [
            {
                "_index": "9fa412b9-1dbc-4e35-be7a-0c0c9c8c8e16",
                "_type": "item",
                "_id": "51c3d2b297c3e6d8d3b51ecf",
                "_score": 2.2296956,
                "fields": {
                    "nf_calories": 170,
                    "item_name": "Laksa Paste"
                }
            },
            {
                "_index": "9fa412b9-1dbc-4e35-be7a-0c0c9c8c8e16",
                "_type": "item",
                "_id": "51c35fb297c3e69de4b01eee",
                "_score": 1.3439745,
                "fields": {
                    "nf_calories": 90,
                    "item_name": "Laksa Coconut Curry, Family Size, Medium"
                }
            },
            {
                "_index": "9fa412b9-1dbc-4e35-be7a-0c0c9c8c8e16",
                "_type": "item",
                "_id": "51c3610597c3e69de4b0275d",
                "_score": 1.1046534,
                "fields": {
                    "nf_calories": 40,
                    "item_name": "Spice Paste For Noodles, Laksa, Coconut Curry Noodles, Mild"
                }
            }
        ]
    }';

我使用json_decode解码$ json并尝试获取nf_calories

$data= json_decode($json);

foreach ($data -> hits as $hit){
    foreach($hit-> fields as $field){
        echo $field->nf_calories;


}

}
?>

错误：

注意：尝试获取非对象的属性第51行的C：\ wamp \ www \ simple_light \ testing.php

当我试图回复$ field时;

这是值

170Laksa Paste90Laksa椰子咖喱，家庭大小，Medium40Spice Paste 面条，Laksa，椰子咖喱面，温和

我不知道我哪里做错了。

Answer 1

对于那种结构，为了获得每次击中的卡路里计数，你只需要一个循环

foreach ($data->hits as $hit){
   echo $hit->fields->nf_calories;
}

<强>输出

170
90
40

foreach错误试图获取非对象的属性

1 个答案: