php - 如何在 php 中使用正则表达式 (regex) 从 json 获取内容

Question

我需要提取一些 html 标签中存在的 json。如何使用正则表达式从下面的 json 中提取名称(键)值

<div id="gwt_products_display_results" class="gwt_products_display_results">
                <span class="JSON" style="display: none;">
{
    "products": [
        {
            "targetURL": "/athena-mineral-fabric-by-the-yard/262682",
            "listIndex": "0",
            "minimumPrice": 20,
            "categoryOnSale": "false",
            "mfPartNumber": "FF010ATM",
            "hasAtLeastOneBuyableAndPublishedItem": "true",
            "attributes": [],
            "partNumber": "b_FF010ATM",
            "itemAsProduct": "true",
            "iapAttribute": "",
            "productDetailTargetURL": "/athena-mineral-fabric-by-the-yard/262682",
            "iapAttributeCode": "",
            "beanType": "bundle",
            "name": "Athena Mineral Fabric by the Yard",
            "maxListPrice": 0,
            "thumbNail": "null",
            "hasSaleSKUs": false,
            "productId": "262682",
            "currencyCode": "USD",
            "hasMoreColors": false,
            "xPriceLabel": "null",
            "minListPrice": 0,
            "maximumPrice": 20,
            "iapAttributeDisplayName": "",
            "shortDescription": "null",
            "listId": "SEARCHRESULTS",
            "categoryId": "null"
        },
        {
            "targetURL": "/athena-slate-fabric-by-the-yard/262683",
            "listIndex": "1",
            "minimumPrice": 20,
            "categoryOnSale": "false",
            "mfPartNumber": "FF010ATS",
            "hasAtLeastOneBuyableAndPublishedItem": "true",
            "attributes": [],
            "partNumber": "b_FF010ATS",
            "itemAsProduct": "true",
            "iapAttribute": "",
            "productDetailTargetURL": "/athena-slate-fabric-by-the-yard/262683",
            "iapAttributeCode": "",
            "beanType": "bundle",
            "name": "Athena Slate Fabric by the Yard",
            "maxListPrice": 0,
            "thumbNail": "null",
            "hasSaleSKUs": false,
            "productId": "262683",
            "currencyCode": "USD",
            "hasMoreColors": false,
            "xPriceLabel": "null",
            "minListPrice": 0,
            "maximumPrice": 20,
            "iapAttributeDisplayName": "",
            "shortDescription": "null",
            "listId": "SEARCHRESULTS",
            "categoryId": "null"
        },
        {
            "targetURL": "/typewriter-keys-giclee/261307",
            "listIndex": "2",
            "minimumPrice": 259,
            "categoryOnSale": "false",
            "mfPartNumber": "WD813",
            "hasAtLeastOneBuyableAndPublishedItem": "true",
            "attributes": [
                {
                    "S7 - Overlay 1": "blank"
                }
            ],
            "partNumber": "p_WD813",
            "itemAsProduct": "true",
            "iapAttribute": "",
            "productDetailTargetURL": "/typewriter-keys-giclee/261307",
            "iapAttributeCode": "",
            "beanType": "product",
            "name": "Typewriter Keys Giclee",
            "maxListPrice": 0,
            "thumbNail": "null",
            "hasSaleSKUs": false,
            "productId": "261307",
            "currencyCode": "USD",
            "hasMoreColors": false,
            "xPriceLabel": "null",
            "minListPrice": 0,
            "maximumPrice": 259,
            "iapAttributeDisplayName": "",
            "shortDescription": "null",
            "listId": "SEARCHRESULTS",
            "categoryId": "null"
        }
    ]
}
</span>
</div>

到目前为止我尝试过的是

<span class="JSON" style="display: none;">([\s\S]+?)<\/span>

Answer 1

您可以将其转换为数组，然后使用 array_keys(); 获取名称

$array = json_decode($json);

$keys = array_keys($array['products']);