如何在dialogflow中使用php webhook读取上下文参数

<?php
// 引入Dialogflow的PHP客户端库
require 'vendor/autoload.php';

use Google\Cloud\Dialogflow\V2\ContextsClient;

// 从请求中获取JSON数据
$request = file_get_contents('php://input');
$json = json_decode($request, true);

// 读取上下文参数
$contexts = $json['queryResult']['outputContexts'];
foreach ($contexts as $context) {
    $contextName = $context['name'];
    $parameters = $context['parameters'];

    // 处理上下文参数
    // ...

    // 示例：打印上下文参数
    echo "Context: $contextName\n";
    echo "Parameters:\n";
    foreach ($parameters as $name => $value) {
        echo "$name: $value\n";
    }
}

// 返回响应给Dialogflow
$response = [
    'fulfillmentText' => '这是一个示例响应',
];
echo json_encode($response);