谷歌分析如何获得访问令牌与服务器到服务器OAuth与php

Question

我想创建一个仪表板的谷歌分析数据，但我不知道如何我可以结合脚本。

我必须使用服务器到服务器的身份验证，如https://developers.google.com/analytics/devguides/config/mgmt/v3/quickstart/service-php但我无法获得访问令牌为我的Javascript身份验证

gapi.analytics.auth.authorize({
   serverAuth: {
      access_token: >>How to get an Access token from PHP<<
   }
});

如果我这样做

$KEY_FILE_LOCATION = __DIR__ . '/Service.json';
$client = new Google_Client();
$client->setApplicationName("Hello Analytics Reporting");
$client->setAuthConfig($KEY_FILE_LOCATION);
$client->setScopes(['https://www.googleapis.com/auth/analytics.readonly']);
var_dump($client->getAccessToken())

我的getAccessToken总是NULL有没有其他方法来接收访问令牌与服务器到服务器的连接?我必须找到不需要通过Javascript登录的方法，因为所有后端用户从内容管理系统应该能够看到数据。

非常感谢。我是新手，如果你能解释一下它是如何工作的，而不仅仅是发送一个链接，那就太好了

编辑:换句话说，这是我的整个代码…为什么不工作，出了什么问题?请帮帮我

    <?php
// Load the Google API PHP Client Library.
require_once __DIR__ . '/vendor/autoload.php';
$accessToken = initializeAnalytics();
function initializeAnalytics()
{
  $KEY_FILE_LOCATION = __DIR__ . '/Service.json';
  $client = new Google_Client();
  $client->setApplicationName("Hello Analytics Reporting");
  $client->setAuthConfig($KEY_FILE_LOCATION);
  $client->setScopes(['https://www.googleapis.com/auth/analytics.readonly']);
  $accessToken = $client->getAccessToken();
  return $accessToken;
}
?>
<script>
    (function(w,d,s,g,js,fjs){
      g=w.gapi||(w.gapi={});g.analytics={q:[],ready:function(cb){this.q.push(cb)}};
      js=d.createElement(s);fjs=d.getElementsByTagName(s)[0];
      js.src='https://apis.google.com/js/platform.js';
      fjs.parentNode.insertBefore(js,fjs);js.onload=function(){g.load('analytics')};
    }(window,document,'script'));
</script>

<div id="chart-1-container"></div>
<script>
    gapi.analytics.ready(function() {
        gapi.analytics.auth.authorize({
          serverAuth: {
            access_token: '<?php echo $accessToken ?>'
          }
        });
        var dataChart = new gapi.analytics.googleCharts.DataChart({
            query: {
                ids: "ga:128053216",
                metrics: 'ga:sessions',
                dimensions: 'ga:date',
                'start-date': '30daysAgo',
                'end-date': 'yesterday',
            },
            chart: {
                container: 'chart-1-container',
                type: 'LINE',
            }
        });
        dataChart.execute();
    });
</script>

Answer 1

经过几天的尝试终于找到了解决方案....现在可以使用下面的脚本

    <?php
// Load the Google API PHP Client Library.
require_once __DIR__ . '/vendor/autoload.php';
$accessToken = initializeAnalytics();
function initializeAnalytics()
{
  $KEY_FILE_LOCATION = __DIR__ . '/Service.json';
  $client = new Google_Client();
  $client->setApplicationName("Hello Analytics Reporting");
  $client->setAuthConfig($KEY_FILE_LOCATION);
  $client->setScopes(['https://www.googleapis.com/auth/analytics.readonly']);
  $client->refreshTokenWithAssertion();
  $token = $client->getAccessToken();
  $accessToken = $token['access_token'];
  return $accessToken;
}
?>
<script>
    (function(w,d,s,g,js,fjs){
      g=w.gapi||(w.gapi={});g.analytics={q:[],ready:function(cb){this.q.push(cb)}};
      js=d.createElement(s);fjs=d.getElementsByTagName(s)[0];
      js.src='https://apis.google.com/js/platform.js';
      fjs.parentNode.insertBefore(js,fjs);js.onload=function(){g.load('analytics')};
    }(window,document,'script'));
</script>

<div id="chart-1-container"></div>
<script>
    gapi.analytics.ready(function() {
        gapi.analytics.auth.authorize({
          serverAuth: {
            access_token: '<?php echo $accessToken ?>'
          }
        });
        var dataChart = new gapi.analytics.googleCharts.DataChart({
            query: {
                ids: ">your analytics ID<",
                metrics: 'ga:sessions',
                dimensions: 'ga:date',
                'start-date': '30daysAgo',
                'end-date': 'yesterday',
            },
            chart: {
                container: 'chart-1-container',
                type: 'LINE',
            }
        });
        dataChart.execute();
    });
</script>