composer require facebook/graph-sdk

<?php
require_once __DIR__ . '/vendor/autoload.php'; // 引入自动加载文件

$fb = new \Facebook\Facebook([
  'app_id' => '{app-id}',
  'app_secret' => '{app-secret}',
  'default_graph_version' => 'v12.0',
]);

// 长期访问令牌（从开发者工具获取）
$accessToken = '{long-lived-access-token}';

try {
  // 获取用户管理的页面
  $response = $fb->get('/me/accounts', $accessToken);
  $pages = $response->getGraphEdge();
  
  foreach ($pages as $page) {
    $pageAccessToken = $page['access_token'];
    $pageId = $page['id'];
    
    // 发布到页面
    $postData = [
      'message' => '这是通过API发布的测试消息',
      'link' => 'https://example.com',
    ];
    
    $response = $fb->post("/$pageId/feed", $postData, $pageAccessToken);
    $graphNode = $response->getGraphNode();
    
    echo '发布成功，帖子ID: ' . $graphNode['id'];
  }
} catch(\Facebook\Exceptions\FacebookResponseException $e) {
  echo 'Graph API 错误: ' . $e->getMessage();
} catch(\Facebook\Exceptions\FacebookSDKException $e) {
  echo 'SDK 错误: ' . $e->getMessage();
}
?>