Python到PHP：FedEx追踪API的POST请求数据转换指南

data = requests.post('https://www.fedex.com/trackingCal/track', data={
    'data': json.dumps({
        'TrackPackagesRequest': {
            # ... 省略内部结构 ...
        }
    }),
    'action': 'trackpackages',
    'locale': 'en_US',
    'format': 'json',
    'version': 99
}).json()

<?php
// ... 省略初始化代码 ...

$headers = ['Content-Type' => 'application/json']; // 错误：不应是application/json

$data = ['data' => [ // 这是一个PHP数组
            'TrackPackagesRequest' => [
                // ... 省略内部结构 ...
            ]],
    'action' => 'trackpackages',
    'locale' => 'en_US',
    'format' => 'json',
    'version' => 99
    ];

$response = Requests::post($url, $headers, json_encode($data)); // 错误：对整个$data数组进行json_encode

print_r($response);

<?php

// 假设您已经通过Composer安装了Requests库，并设置了自动加载
$dir = __DIR__;
include $dir .'/vendor/autoload.php'; // 引入Requests库

// 追踪号码示例
$tracking_number = '123456789'; 

// FedEx追踪API的URL
$url = 'https://www.fedex.com/trackingCal/track';

// HTTP请求头，这里不需要明确设置Content-Type为application/json
// Requests库在发送表单数据时会自动处理为 application/x-www-form-urlencoded
$headers = []; 

// 构建请求数据数组
// 关键点：只有 'data' 字段的值需要被 json_encode
$data = [
    "data" => json_encode([ // 将TrackPackagesRequest部分编码为JSON字符串
        "TrackPackagesRequest" => [
            "appType" => "wtrk",
            "uniqueKey" => "",
            "processingParameters" => [
                "anonymousTransaction" => true,
                "clientId" => "WTRK",
                "returnDetailedErrors" => true,
                "returnLocalizedDateTime" => false
            ],
            "trackingInfoList" => [[
                "trackNumberInfo" => [
                    "trackingNumber" => $tracking_number,
                    "trackingQualifier" => "",
                    "trackingCarrier" => ""
                ]
            ]]
        ]
    ]),
    "action" => "trackpackages",
    "locale" => "en_US",
    "format" => "json",
    "version" => 99
];

// 发送POST请求
// Requests::post() 方法如果接收一个数组作为第三个参数（$data），
// 默认会将其作为 application/x-www-form-urlencoded 类型的表单数据发送
$response = Requests::post($url, $headers, $data);

// 打印API响应
print_r($response);

// 进一步处理响应（例如解析JSON）
if ($response->success) {
    $responseData = json_decode($response->body, true);
    // 提取所需信息
    $fedex_status  = $responseData['TrackPackagesResponse']['packageList'][0]['keyStatus'] ?? 'N/A';
    $fedex_details = $responseData['TrackPackagesResponse']['packageList'][0]['statusWithDetails'] ?? 'N/A';
    $delivery_date = $responseData['TrackPackagesResponse']['packageList'][0]['displayActDeliveryDt'] ?? 'N/A';
    $delivery_time = $responseData['TrackPackagesResponse']['packageList'][0]['displayActDeliveryTm'] ?? 'N/A';

    echo "FedEx Status: " . $fedex_status . "\n";
    echo "Details: " . $fedex_details . "\n";
    echo "Delivery Date: " . $delivery_date . "\n";
    echo "Delivery Time: " . $delivery_time . "\n";
} else {
    echo "Error: " . $response->status_code . " - " . $response->body . "\n";
}

?>