如何使用PHP遍历JSON数组 [英] How to loop through JSON array using PHP

问题描述

我的PHP代码:

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

虽然它适用于非数组，但我终生无法弄清楚如何打印评论"数组中的所有值.

While it works for non-arrays, I can't for the life of me figure out how to print all the values within the "Reviews" Array.

我想做的是遍历此响应，可能使用forreach()，从而得到一个包含响应中每个评论的评分和摘录的列表.

What I would like to do is to loop through this response, probably with forreach(), resulting in a list containing the rating and excerpt for each review in the response.

任何指导/方向都将不胜感激.

Any guidance / direction is greatly appreciated..

以下是我正在使用的JSON. (这是Yelp API的响应).

Below is the JSON I'm working with. (it is the response from the Yelp API).

{
    "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": "[phone]",
    "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"
    }
}

推荐答案

您可能会遇到麻烦，因为评论是一个数组，并且您试图将其作为JSON对象进行访问.

You are probably having trouble because reviews is an array and you are trying to access it as a JSON object.

$obj = json_decode($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>";
}

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