php - 将 PHP 变量设置为 JSON 对象中的值
问题描述
我有一个 PHP 文件，它获取一个名为 $response 的 JSON 对象。$response 有很多值（如下所示），我想提取一些包括标题和价格。我已经尝试了下面的代码，但它没有显示任何结果（没有错误，没有价值！）。想法？
谢谢
PHP代码：
$data = json_decode($response, true);
echo $data->ItemsResult->Items[0]->ItemInfo->Title->DisplayValue;
$响应=
{
"ItemsResult": {
"Items": [{
"ASIN": "B0825SNHP1",
"BrowseNodeInfo": {
"BrowseNodes": [{
"Ancestor": {
"Ancestor": {
"Ancestor": {
"ContextFreeName": "Toys & Games",
"DisplayName": "Toys & Games",
"Id": "165793011"
},
"ContextFreeName": "Toys & Games",
"DisplayName": "Categories",
"Id": "165795011"
},
"ContextFreeName": "Stuffed Animals & Plush Toys",
"DisplayName": "Stuffed Animals & Plush Toys",
"Id": "166461011"
},
"ContextFreeName": "Plush Figure Toys",
"DisplayName": "Plush Figures",
"Id": "11350121011",
"IsRoot": false,
"SalesRank": 1
}],
"WebsiteSalesRank": {
"ContextFreeName": "Toys & Games",
"DisplayName": "Toys & Games",
"SalesRank": 32
}
},
"DetailPageURL": "https://www.amazon.com/dp/B0825SNHP1?tag=tpf0bee-20&linkCode=ogi&th=1&psc=1",
"Images": {
"Primary": {
"Large": {
"Height": 500,
"URL": "https://m.media-amazon.com/images/I/51P8jTxbP2L.jpg",
"Width": 467
},
"Medium": {
"Height": 160,
"URL": "https://m.media-amazon.com/images/I/51P8jTxbP2L._SL160_.jpg",
"Width": 149
},
"Small": {
"Height": 75,
"URL": "https://m.media-amazon.com/images/I/51P8jTxbP2L._SL75_.jpg",
"Width": 70
}
},
"Variants": [{
"Large": {
"Height": 450,
"URL": "https://m.media-amazon.com/images/I/51myKYEuuuL.jpg",
"Width": 500
},
"Medium": {
"Height": 144,
"URL": "https://m.media-amazon.com/images/I/51myKYEuuuL._SL160_.jpg",
"Width": 160
},
"Small": {
"Height": 68,
"URL": "https://m.media-amazon.com/images/I/51myKYEuuuL._SL75_.jpg",
"Width": 75
}
}, {
"Large": {
"Height": 500,
"URL": "https://m.media-amazon.com/images/I/515j0HmJV0L.jpg",
"Width": 500
},
"Medium": {
"Height": 160,
"URL": "https://m.media-amazon.com/images/I/515j0HmJV0L._SL160_.jpg",
"Width": 160
},
"Small": {
"Height": 75,
"URL": "https://m.media-amazon.com/images/I/515j0HmJV0L._SL75_.jpg",
"Width": 75
}
}, {
"Large": {
"Height": 466,
"URL": "https://m.media-amazon.com/images/I/51ARoLKEn5L.jpg",
"Width": 500
},
"Medium": {
"Height": 149,
"URL": "https://m.media-amazon.com/images/I/51ARoLKEn5L._SL160_.jpg",
"Width": 160
},
"Small": {
"Height": 70,
"URL": "https://m.media-amazon.com/images/I/51ARoLKEn5L._SL75_.jpg",
"Width": 75
}
}, {
"Large": {
"Height": 500,
"URL": "https://m.media-amazon.com/images/I/414gFkO4AmL.jpg",
"Width": 446
},
"Medium": {
"Height": 160,
"URL": "https://m.media-amazon.com/images/I/414gFkO4AmL._SL160_.jpg",
"Width": 143
},
"Small": {
"Height": 75,
"URL": "https://m.media-amazon.com/images/I/414gFkO4AmL._SL75_.jpg",
"Width": 67
}
}, {
"Large": {
"Height": 500,
"URL": "https://m.media-amazon.com/images/I/516zb5W2o3L.jpg",
"Width": 476
},
"Medium": {
"Height": 160,
"URL": "https://m.media-amazon.com/images/I/516zb5W2o3L._SL160_.jpg",
"Width": 152
},
"Small": {
"Height": 75,
"URL": "https://m.media-amazon.com/images/I/516zb5W2o3L._SL75_.jpg",
"Width": 71
}
}]
},
"ItemInfo": {
"ByLineInfo": {
"Brand": {
"DisplayValue": "Mattel",
"Label": "Brand",
"Locale": "en_US"
},
"Manufacturer": {
"DisplayValue": "Mattel",
"Label": "Manufacturer",
"Locale": "en_US"
}
},
"Classifications": {
"Binding": {
"DisplayValue": "Accessory",
"Label": "Binding",
"Locale": "en_US"
},
"ProductGroup": {
"DisplayValue": "Toy",
"Label": "ProductGroup",
"Locale": "en_US"
}
},
"ContentInfo": {
"Edition": {
"DisplayValue": "Star Wars Edition",
"Label": "Edition",
"Locale": "en_US"
}
},
"ExternalIds": {
"EANs": {
"DisplayValues": ["0887961938814"],
"Label": "EAN",
"Locale": "en_US"
},
"UPCs": {
"DisplayValues": ["887961938814"],
"Label": "UPC",
"Locale": "en_US"
}
},
"Features": {
"DisplayValues": ["This 11-inch The Child plush toy will capture the hearts of Star Wars fans everywhere", "Inspired by the Disney+ series The Mandalorian, the adorable figure with green skin, big ears and large eyes resembles a baby Yoda but is referred to as The Child.", "The toy plush has a soft body, plus a sturdy base filled with beans, perfect for cuddling or display as a collectible", "The character wears his robes as seen in the show.", "Star Wars fans will love taking on the role of The Mandalorian Bounty Hunter and caring for The Child on their own", "Material Type: Polyester"],
"Label": "Features",
"Locale": "en_US"
},
"ManufactureInfo": {
"ItemPartNumber": {
"DisplayValue": "GWD85",
"Label": "PartNumber",
"Locale": "en_US"
},
"Model": {
"DisplayValue": "GWD85",
"Label": "Model",
"Locale": "en_US"
},
"Warranty": {
"DisplayValue": "No Warranty",
"Label": "Warranty",
"Locale": "en_US"
}
},
"ProductInfo": {
"Color": {
"DisplayValue": "Green",
"Label": "Color",
"Locale": "en_US"
},
"IsAdultProduct": {
"DisplayValue": false,
"Label": "IsAdultProduct",
"Locale": "en_US"
},
"ItemDimensions": {
"Height": {
"DisplayValue": 11.02,
"Label": "Height",
"Locale": "en_US",
"Unit": "Inches"
},
"Length": {
"DisplayValue": 5.98,
"Label": "Length",
"Locale": "en_US",
"Unit": "Inches"
},
"Weight": {
"DisplayValue": 0.220462262,
"Label": "Weight",
"Locale": "en_US",
"Unit": "Pounds"
},
"Width": {
"DisplayValue": 7.99,
"Label": "Width",
"Locale": "en_US",
"Unit": "Inches"
}
},
"ReleaseDate": {
"DisplayValue": "2020-02-12T00:00:01Z",
"Label": "ReleaseDate",
"Locale": "en_US"
},
"Size": {
"DisplayValue": "11 inches",
"Label": "Size",
"Locale": "en_US"
},
"UnitCount": {
"DisplayValue": 1,
"Label": "NumberOfItems",
"Locale": "en_US"
}
},
"Title": {
"DisplayValue": "Mattel Star Wars The Child Plush Toy, 11-Inch Small Yoda-Like Soft Figure from The Mandalorian, Green",
"Label": "Title",
"Locale": "en_US"
}
},
"Offers": {
"Listings": [{
"Availability": {
"Message": "In stock. Usually ships within 4 to 5 days.",
"MinOrderQuantity": 1,
"Type": "Now"
},
"Condition": {
"SubCondition": {
"Value": "New"
},
"Value": "New"
},
"DeliveryInfo": {
"IsAmazonFulfilled": false,
"IsFreeShippingEligible": false,
"IsPrimeEligible": false
},
"Id": "xZd%2BKU9rGH7fWwKPEUHMfhsQHzl3QpAN6kIllBjmOl90egwIXEDSkqIt1nqy2q90nMMKYhKCECzkZugn%2FhS6MNMQ0DeGGHgqoDimWML40ChnAKQi3WGnvzASkBlZn3fOYl%2Fk7qoY%2FkafbujzE4UkOjHO6D2nEkcs",
"IsBuyBoxWinner": false,
"MerchantInfo": {
"DefaultShippingCountry": "US",
"FeedbackCount": 261,
"FeedbackRating": 3.53,
"Id": "A111I7FGCUO8HR",
"Name": "ZDeals"
},
"Price": {
"Amount": 27.58,
"Currency": "USD",
"DisplayAmount": "$27.58"
},
"ProgramEligibility": {
"IsPrimeExclusive": false,
"IsPrimePantry": false
},
"ViolatesMAP": false
}],
"Summaries": [{
"Condition": {
"Value": "Collectible"
},
"HighestPrice": {
"Amount": 68.94,
"Currency": "USD",
"DisplayAmount": "$68.94"
},
"LowestPrice": {
"Amount": 58.99,
"Currency": "USD",
"DisplayAmount": "$58.99"
},
"OfferCount": 2
}, {
"Condition": {
"Value": "New"
},
"HighestPrice": {
"Amount": 58.75,
"Currency": "USD",
"DisplayAmount": "$58.75"
},
"LowestPrice": {
"Amount": 22.48,
"Currency": "USD",
"DisplayAmount": "$22.48"
},
"OfferCount": 224
}]
}
}]
}
}
解决方案
json_decode 函数的第二个参数启用关联数组结果。所以在你的情况下，你可以做
$data = json_decode($response);
echo $data->ItemsResult->Items[0]->ItemInfo->Title->DisplayValue;
或者
$data = json_decode($response, true);
echo $data['ItemsResult']['Items'][0]['ItemInfo']['Title']['DisplayValue'];
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