// 使用Facebook JavaScript SDK
FB.api(
  '/me/picture',
  {
    redirect: false,
    height: 200,  // 可选参数，指定高度
    width: 200    // 可选参数，指定宽度
  },
  function(response) {
    if (response && !response.error) {
      console.log(response.data.url);
    }
  }
);

// 需要user_photos权限
FB.api(
  '/{user-id}/picture',
  {
    redirect: false,
    type: 'large'  // small, normal, album, large, square
  },
  function(response) {
    // 处理响应
  }
);

// 登录时请求user_photos权限
FB.login(function(response) {
  // 处理响应
}, {scope: 'user_photos'});

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

try {
  $response = $fb->get('/me/picture?redirect=0&height=200', '{access-token}');
  $graphNode = $response->getGraphNode();
  $photoUrl = $graphNode['url'];
} catch(Facebook\Exceptions\FacebookResponseException $e) {
  echo 'Graph returned an error: ' . $e->getMessage();
} catch(Facebook\Exceptions\FacebookSDKException $e) {
  echo 'Facebook SDK returned an error: ' . $e->getMessage();
}