添加AWS标头时，PHP echo不起作用

我正在做一个有服务器的项目。服务器连接到AmazonCognito以获取标识Id和令牌。这是我的PHP代码

TEST.PHP：

include 'aws.phar';

//require 'vendor/autoload.php';
use Aws\CognitoIdentity\CognitoIdentityClient;
use Aws\Sts\StsClient;
use Aws\Credentials\Credentials;
use Aws\S3\S3Client;

echo "OK";

$Client = CognitoIdentityClient::factory(array(
  'version' => 'latest',
  'profile' => 'project1',
  'region'  => 'ap-northeast-1'
));

$result = $Client->getOpenIdTokenForDeveloperIdentity(array(
  'IdentityPoolId' => 'xxxxxxxxxxxx',

  'Logins' => array(
    'login.blupinch.app' => 'sandesh-004',
  ),
  'TokenDuration' => 3600,
));

echo $token = $result['Token'];
//echo null;

当我打开浏览器并键入服务器的url时，我只能看到“OK”，但看不到

$token

的值。有趣的是，如果从命令行执行此操作，我可以看到“OK”和

$token

值：

php test.php 

为什么会这样？ 为什么我看不到

$token

的值

更新： 当我运行“php test.php”时。我能看到token的回声，像这样

ubuntu@ip-172-31-30-222:/var/www/html$php test.php

   OKeyJraWQiOiJhcC1ub3J0aGVhc3QtMTEiLCJ0eXAiOiJKV1MiLCJhbGciOiJSUzUxMiJ9.eyJzdWIiOiJhcC1ub3J0aGVhc3QtMToxMmJiZTJjOS0zMDZkLTRmY2ItOGY4Mi0yZmNlNjc3NmE1NjQiLCJhdWQiOiJhcC1ub3J0aGVhc3QtMTphODcxZmE1Zi0yM2EyLTQ4MGQtYmFhNi1iNGVkMzE0MzcyNDQiLCJhbXIiOlsiYXV0aGVudGljYXRlZCIsImxvZ2luLmJsdXBpbmNoLmFwcCIsImxvZ2luLmJsdXBpbmNoLmFwcDphcC1ub3J0aGVhc3QtMTphODcxZmE1Zi0yM2EyLTQ4MGQtYmFhNi1iNGVkMzE0MzcyNDQ6c2FuZGVzaC0wMDQiXSwiaXNzIjoiaHR0cHM6Ly9jb2duaXRvLWlkZW50aXR5LmFtYXpvbmF3cy5jb20iLCJleHAiOjE0NTQ2ODczMzcsImlhdCI6MTQ1NDY4MzczN30.BSTYTw8bk27vuqHaElIjC1KdncJpQHQXpqJr3--eKGOIi1vq8rpTGuljm2XjNInCXvjjMTLxaG8ZN-gUHYdZGcvK6Bm9ts1Y_BPfOflVKjRU3rxemmY24gOQeb1xI0No6nvyhJW6MpkoOF2fGWmr79mL0J0PnepOQ4HxG_HJ6yGdrvRypFjDM7g7kLXvETeEYrJeDdvnYuoeh1sqRn7RkA9eea_5pq8Sbgk5bXhF1RUhLF_6pi-YMIu52-lLFZdbA0LxGTWrIKvZY-KhsKSBLt_A5ek52pXQSPJUcBFOVWgajVqpdBB7i-ls1IjLth0baLtCXgk1qsq52kDKWqvR6g

---

这将不会输出true，这将是零

echo $token = $result['Token'];

通过使用代码

echo $token = $result['Token'];

您只是将$result['Token']的值赋值给$Token的布尔结果回显。看起来您还应该引用“TokenDuration”

你需要这样做

$token = $result['TokenDuration'];
echo $token;

---

检查是否存在连接错误我尝试执行卷曲“ip地址”，但仍显示正常。正如我所说，当我从命令行运行它时，它正在工作。

$token = $result['TokenDuration'];
echo $token;