如何解决PHP应用与MailerLite邮件营销服务集成难题，使用Composer和官方SDK可以轻松实现

<code class="bash">composer require mailerlite/mailerlite-api-v2-php-sdk</code>

<code class="bash">composer require php-http/guzzle6-adapter</code>

<pre class="brush:php;toolbar:false;"><?php

require 'vendor/autoload.php'; // Composer的自动加载文件

use MailerLiteApi\MailerLite;
use GuzzleHttp\Client;
use Http\Adapter\Guzzle6\Client as GuzzleAdapter;

// 替换为你的MailerLite API Key
$apiKey = 'your-api-key';

// 1. 初始化 MailerLite 客户端
// 默认使用cURL，你也可以指定其他HTTP客户端，例如Guzzle
$guzzle = new Client();
$guzzleClient = new GuzzleAdapter($guzzle);
$mailerliteClient = new MailerLite($apiKey, $guzzleClient);

// 获取 Groups API 实例
$groupsApi = $mailerliteClient->groups();

echo "--- 群组操作示例 ---\n";

// 2. 创建一个新群组
try {
    $newGroup = $groupsApi->create(['name' => '新注册用户']);
    echo "成功创建群组: " . $newGroup->name . " (ID: " . $newGroup->id . ")\n";
} catch (\Exception $e) {
    echo "创建群组失败: " . $e->getMessage() . "\n";
    // 假设群组已存在，我们尝试获取它
    $allGroups = $groupsApi->get();
    foreach ($allGroups as $group) {
        if ($group->name === '新注册用户') {
            $newGroup = $group;
            echo "群组 '新注册用户' 已存在 (ID: " . $newGroup->id . ")\n";
            break;
        }
    }
    if (!isset($newGroup)) {
        die("无法创建或找到 '新注册用户' 群组，程序退出。\n");
    }
}


// 3. 获取所有群组
$allGroups = $groupsApi->get();
echo "所有群组:\n";
foreach ($allGroups as $group) {
    echo "- " . $group->name . " (ID: " . $group->id . ")\n";
}

// 4. 将订阅者添加到指定群组
$subscriberEmail = 'test_user_' . uniqid() . '@example.com';
$subscriber = [
    'email' => $subscriberEmail,
    'fields' => [
        'name' => '测试用户',
        'company' => '我的公司'
    ]
];

try {
    $addedSubscriber = $groupsApi->addSubscriber($newGroup->id, $subscriber);
    echo "成功添加订阅者 " . $addedSubscriber->email . " 到群组 " . $newGroup->name . "\n";
} catch (\Exception $e) {
    echo "添加订阅者失败: " . $e->getMessage() . "\n";
}

// 5. 获取指定群组的订阅者
try {
    $subscribersInGroup = $groupsApi->getSubscribers($newGroup->id);
    echo "群组 " . $newGroup->name . " 中的订阅者数量: " . count($subscribersInGroup) . "\n";
    // 可以进一步遍历 $subscribersInGroup 查看详情
} catch (\Exception $e) {
    echo "获取群组订阅者失败: " . $e->getMessage() . "\n";
}

// 你还可以获取其他API实例，例如 Fields API
$fieldsApi = $mailerliteClient->fields();
$fields = $fieldsApi->get();
echo "\n--- 字段操作示例 ---\n";
echo "所有自定义字段:\n";
foreach ($fields as $field) {
    echo "- " . $field->title . " (Key: " . $field->key . ")\n";
}

?>