web-dev-qa-db-ja.com

PHPを使用してJSON配列をループする方法

私のPHPコード：

$obj = json_decode($data);
print $obj->{'name'};

配列以外でも機能しますが、「Reviews」配列内のすべての値を出力する方法を理解することはできません。

私がやりたいのは、おそらくforreach（）を使用してこの応答をループ処理し、応答の各レビューの評価と抜粋を含むリストを作成することです。

どんなガイダンス/指示も大歓迎です。

以下は、使用しているJSONです。 （これは、Yelp APIからの応答です）。

{
    "is_claimed": true,
    "rating": 4.5,
    "mobile_url": "http://m.Yelp.com/biz/economy-Paint-and-collision-riverside",
    "rating_img_url": "http://s3-media2.ak.yelpcdn.com/assets/2/www/img/99493c12711e/ico/stars/v1/stars_4_half.png",
    "review_count": 19,
    "name": "Economy Paint & Collision",
    "snippet_image_url": "http://s3-media3.ak.yelpcdn.com/photo/ZOzoahw0Go_DEPLvxCaP_Q/ms.jpg",
    "rating_img_url_small": "http://s3-media2.ak.yelpcdn.com/assets/2/www/img/a5221e66bc70/ico/stars/v1/stars_small_4_half.png",
    "url": "http://www.Yelp.com/biz/economy-Paint-and-collision-riverside",
    "reviews": [
        {
            "rating": 3,
            "excerpt": "The Good:\nDennis quoted me a price over the phone about 1 month before I took my wifes 2010 Escalade in for repairs and when I took it in he gave me the...",
            "time_created": 1357010247,
            "rating_image_url": "http://s3-media3.ak.yelpcdn.com/assets/2/www/img/34bc8086841c/ico/stars/v1/stars_3.png",
            "rating_image_small_url": "http://s3-media3.ak.yelpcdn.com/assets/2/www/img/902abeed0983/ico/stars/v1/stars_small_3.png",
            "user": {
                "image_url": "http://s3-media3.ak.yelpcdn.com/photo/mIsU7ugYd88lLA-XL2q1Cg/ms.jpg",
                "id": "V9MDZvEBv-tBTF4YIoc7mg",
                "name": "Sydney H."
            },
            "rating_image_large_url": "http://s3-media1.ak.yelpcdn.com/assets/2/www/img/e8b5b79d37ed/ico/stars/v1/stars_large_3.png",
            "id": "HfOhzLIlJoUKSKU8euclqA"
        },
        {
            "rating": 5,
            "excerpt": "Dennis and his team did an amazing job on the roof of my fiancee's 2002 Acura RSX after years of living by the beach in San Francisco had mostly rusted...",
            "time_created": 1354741952,
            "rating_image_url": "http://s3-media1.ak.yelpcdn.com/assets/2/www/img/f1def11e4e79/ico/stars/v1/stars_5.png",
            "rating_image_small_url": "http://s3-media1.ak.yelpcdn.com/assets/2/www/img/c7623205d5cd/ico/stars/v1/stars_small_5.png",
            "user": {
                "image_url": "http://s3-media3.ak.yelpcdn.com/photo/ZOzoahw0Go_DEPLvxCaP_Q/ms.jpg",
                "id": "kOqCnCjYn0EbAhtH1tfjcw",
                "name": "Jason H."
            },
            "rating_image_large_url": "http://s3-media3.ak.yelpcdn.com/assets/2/www/img/22affc4e6c38/ico/stars/v1/stars_large_5.png",
            "id": "YzZg1LX6zeRaurq9tYUcMw"
        },
        {
            "rating": 5,
            "excerpt": "It's been a year since I had my car painted here, and I gotta say: It still looks just as good as it did when I first picked it up. You would never know...",
            "time_created": 1361043626,
            "rating_image_url": "http://s3-media1.ak.yelpcdn.com/assets/2/www/img/f1def11e4e79/ico/stars/v1/stars_5.png",
            "rating_image_small_url": "http://s3-media1.ak.yelpcdn.com/assets/2/www/img/c7623205d5cd/ico/stars/v1/stars_small_5.png",
            "user": {
                "image_url": "http://s3-media1.ak.yelpcdn.com/photo/58coTtu1x5riHSgFEAQsfw/ms.jpg",
                "id": "kVrW3138d5VL-AZ97wFF4A",
                "name": "Jeanne M."
            },
            "rating_image_large_url": "http://s3-media3.ak.yelpcdn.com/assets/2/www/img/22affc4e6c38/ico/stars/v1/stars_large_5.png",
            "id": "r5WtlQVMXiIMBR6S3N7RZw"
        }
    ],
    "phone": "9517870227",
    "snippet_text": "Dennis and his team did an amazing job on the roof of my fiancee's 2002 Acura RSX after years of living by the beach in San Francisco had mostly rusted...",
    "image_url": "http://s3-media3.ak.yelpcdn.com/bphoto/kodoEcmgHRG61pPaWRndbw/ms.jpg",
    "categories": [
        [
            "Body Shops",
            "bodyshops"
        ],
        [
            "Auto Repair",
            "autorepair"
        ]
    ],
    "display_phone": "+1-951-787-0227",
    "rating_img_url_large": "http://s3-media4.ak.yelpcdn.com/assets/2/www/img/9f83790ff7f6/ico/stars/v1/stars_large_4_half.png",
    "id": "economy-Paint-and-collision-riverside",
    "is_closed": false,
    "location": {
        "city": "Riverside",
        "display_address": [
            "2548 Rubidoux Blvd",
            "Riverside, CA 92509"
        ],
        "geo_accuracy": 8,
        "postal_code": "92509",
        "country_code": "US",
        "address": [
            "2548 Rubidoux Blvd"
        ],
        "coordinate": {
            "latitude": 34.0132437,
            "longitude": -117.3923804
        },
        "state_code": "CA"
    }
}
phpjsonparsingyelp
14
user2170611

レビューは配列であり、JSONオブジェクトとしてアクセスしようとしているため、おそらく問題が発生しています。

$obj = json_decode($data, TRUE);
for($i=0; $i<count($obj['reviews']); $i++) {
    echo "Rating is " . $obj['reviews'][$i]["rating"] . " and the excerpt is " . $obj['reviews'][$i]["excerpt"] . "<BR>";
}
19
eliot

あなたが正確に何を望んでいるかは分かりませんが、デバッグのためだけに印刷したいと思います。 print_r($obj);とvar_dump($obj);で試すことができます-それらは何か、特にvar_dump()を出力する必要があります。データが表示されたら、関数を少し簡単に編集できるため、_$obj_がオブジェクトまたは配列であるかどうかに応じて、たとえばprint_r($obj->reviews)またはprint_r($obj['reviews'])を実行できます。

1
ceruleus

Var_dumpまたはprint_rを使用できます。

<?php 
$decodedJSON = json_decode($jsonData);

// Put everyting to the screen with var_dump;
var_dump($decodedJSON);

// With print_r ( useful for arrays );
print_r($decodedJSON);

// List just review ratings with foreach;
foreach($decodedJSON['reviews'] as $review){
    echo $review['rating'];
}
?>
0
Tim

ここではオブジェクトの例を使用しています（レビューを読む...評価）：

$jsonObject = json_decode($data);
foreach ($jsonObject->reviews as $data) {
    echo $data->rating;
}
0
D.Snap