Pagespeed Insights PHP、JSON、CURL 问题？答案

【问题标题】：Pagespeed Insights PHP, JSON, CURL Issue?Pagespeed Insights PHP、JSON、CURL 问题？
【发布时间】：2021-06-22 10:32:49
【问题描述】：

我在使用 Pagespeed API 时遇到了一些问题。我正在使用 CURL 来处理 JSON，如下所示：

$ch = curl_init("https://www.googleapis.com/pagespeedonline/v5/runPagespeed?url=$url&key=KEY&strategy=mobile");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$curl_response = curl_exec($ch);
$json = json_decode($curl_response);

从灯塔指标输出信息很好，即：

echo $json->lighthouseResult->audits->metrics->details->items[0]->firstContentfulPaint;

但是使用 Lighthouse 以外的任何东西我都会遇到问题，因为很多键都是连字符的，即：

  "lighthouseResult": {
        "requestedUrl": "https://codepen.io/",
        "finalUrl": "https://codepen.io/",
        "lighthouseVersion": "7.1.0",
        "userAgent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/88.0.4324.202 Safari/537.36",
        "fetchTime": "2021-03-25T12:50:30.855Z",
        "environment": {
            "networkUserAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4143.7 Safari/537.36 Chrome-Lighthouse",
            "hostUserAgent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/88.0.4324.202 Safari/537.36",
            "benchmarkIndex": 993
        },
        "runWarnings": [],
        "configSettings": {
            "emulatedFormFactor": "desktop",
            "formFactor": "desktop",
            "locale": "en-US",
            "onlyCategories": [
                "performance"
            ],
            "channel": "lr"
        },
        "audits": {
            "uses-rel-preload": {
                "id": "uses-rel-preload",
                "title": "Preload key requests",
                "description": "Consider using `\u003clink rel=preload\u003e` to prioritize fetching resources that are currently requested later in page load. [Learn more](https://web.dev/uses-rel-preload/).",
                "score": 0.48,
                "scoreDisplayMode": "numeric",
                "displayValue": "Potential savings of 950 ms",
                "details": {
                    "type": "opportunity",
                    "items": [
                        {
                            "wastedMs": 950,
                            "url": "https://codepen.io/assets/packs/css/Homepage-Anon-8d383add.chunk.css"
                        },
                        {
                            "url": "https://cpwebassets.codepen.io/assets/packs/css/Homepage-Anon-8d383add.chunk.css",
                            "wastedMs": 500
                        }
                    ],
                    "overallSavingsMs": 950,
                    "headings": [
                        {
                            "label": "URL",
                            "valueType": "url",
                            "key": "url"
                        },
                        {
                            "label": "Potential Savings",
                            "key": "wastedMs",
                            "valueType": "timespanMs"
                        }
                    ]
                },
                "numericValue": 950
            },
            "uses-responsive-images": {
                "id": "uses-responsive-images",
                "title": "Properly size images",
                "description": "Serve images that are appropriately-sized to save cellular data and improve load time. [Learn more](https://web.dev/uses-responsive-images/).",
                "score": 0.65,
                "scoreDisplayMode": "numeric",
                "displayValue": "Potential savings of 611 KiB",
                "details": {
                    "items": [
                        {
                            "totalBytes": 218372,
                            "wastedPercent": 72.994829780464528,
                            "url": "https://cpwebassets.codepen.io/assets/packs/editor-support-9cc33b6268c0a6c897033028084e1851.png",
                            "wastedBytes": 159400
                        },
                        {
                            "wastedBytes": 129352,
                            "wastedPercent": 72.994829780464528,
                            "totalBytes": 177207,
                            "url": "https://cpwebassets.codepen.io/assets/packs/editor-assets-6a081a7c8ff72da526846f3c8f8ae91c.png"
                        },
                        {
                            "totalBytes": 133650,
                            "wastedBytes": 87951,
                            "wastedPercent": 65.807290055077658,
                            "url": "https://cpwebassets.codepen.io/assets/packs/editor-embed-eae2ee445ef0f63ee8fc7f175858e9d9.png"
                        },
                        {
                            "url": "https://cpwebassets.codepen.io/assets/packs/editor-projects-a0d6a9e16cf1c2c46219ef3d49370823.png",
                            "wastedBytes": 83946,
                            "wastedPercent": 65.795548786132358,
                            "totalBytes": 127586
                        },
                        {
                            "wastedBytes": 73120,
                            "wastedPercent": 72.994829780464528,
                            "totalBytes": 100172,
                            "url": "https://cpwebassets.codepen.io/assets/packs/editor-privacy-e542bc22ce324502eb727577083eeb61.png"
                        },
                        {
                            "url": "https://cpwebassets.codepen.io/assets/packs/greensock-logo-9db91ff4c4a50faa1690d4f3d7ffca6e.png",
                              "wastedPercent": 93.017321373337452,
                              "wastedBytes": 50970,
                              "totalBytes": 54796
                            },
                            {
                              "wastedBytes": 34189,
                              "wastedPercent": 65.783751672863872,
                              "url": "https://cpwebassets.codepen.io/assets/packs/editor-collab-90815f9b83fcbdbd3ef7df4573ed9b57.png",
                              "totalBytes": 51972
                            },
                            {
                              "wastedPercent": 75,
                              "url": "https://cdn4.buysellads.net/uu/1/82455/1609889978-aws_carbon.jpg",
                              "totalBytes": 9457,
                              "wastedBytes": 7093
                            }
                    ],
                    "type": "opportunity",
                    "overallSavingsBytes": 626021,
                    "overallSavingsMs": 480,
                    "headings": [
                        {
                          "key": "url",
                          "valueType": "thumbnail"
                        },
                        {
                          "valueType": "url",
                          "label": "URL",
                          "key": "url"
                        },
                        {
                          "key": "totalBytes",
                          "valueType": "bytes",
                          "label": "Resource Size"
                        },
                        {
                          "label": "Potential Savings",
                          "key": "wastedBytes",
                          "valueType": "bytes"
                        }
                    ]
                },
                "numericValue": 480
            },
           
          },
        
        }

我已尝试更改查询，例如：

$json->lighthouseResult->audits['uses-responsive-images']->displayValue;

$json->lighthouseResult->audits->['uses-responsive-images']->displayValue;

但是不能得到结果或者只是得到一个 PHP 错误。我可能错过了一些简单的东西，但我一生都找不到它。

【问题讨论】：

我猜它不是数组所以$json->lighthouseResult->audits->{'uses-responsive-images'}->displayValue;
但在未来，我只是得到一个 PHP 错误 后面应该是 错误消息 在它的整个
感谢您的回复！我试过了，那样没有错误，但它也没有返回任何东西。
你能给我们看一个$json的合理例子吗
您的简化示例不是有效的 JSON。请在创建示例时确保它们作为独立摘录有效。

标签： php json api curl pagespeed

【解决方案1】：

有点做作的例子......但它显示了如何使用名称中的连字符来寻址对象。

//build a object with 
$o = new stdClass();

$o->aa = new stdClass();
$o->aa->{'z-z-z'} = new stdClass();
$o->aa->{'z-z-z'}->bb = new stdClass();
$o->aa->{'z-z-z'}->bb->count = 100;
// check what it actually looks like
print_r($o);
// Address the count
echo $o->aa->{'z-z-z'}->bb->count;

结果

stdClass Object
(
    [aa] => stdClass Object
        (
            [z-z-z] => stdClass Object
                (
                    [bb] => stdClass Object
                        (
                            [count] => 100
                        )
                )
        )
)
100

仔细查看你的数据，我认为你在某个地方迷路了，试试

$json->lighthouseResult
    ->{'uses-responsive-images'}
    ->{'uses-rel-preload'}
    ->displayValue

【讨论】：