你关心头像大小吗?在使用PHP实现登录Facebook时。我们将向您展示在Facebook PHP SDK中获得大尺寸头像的简单方法。此外，您还可以获得自定义大小的Facebook个人资料的图像。

使用下面的代码行设置头像尺寸。

$userProfile = $facebook->api('/me?fields=picture.width(400).height(400)');

查看这个帖子:http://www.codexworld.com/how-to-guides/get-large-size-profile-picture-in-facebook-php-sdk/

将此作为已接受答案的评论，但觉得它值得更长的解释。从2015年4月开始，这可能会提高几次。

As of V2 of the graph api the accepted answer no longer works using a username. So now you need the userid first, and you can no longer use a username to get this. To further complicate matters, for privacy reasons, Facebook is now changing userid's per app (see https://developers.facebook.com/docs/graph-api/reference/v2.2/user/ and https://developers.facebook.com/docs/apps/upgrading/#upgrading_v2_0_user_ids ), so you will have to have some kind of proper authentication to retrieve a userid you can use. Technically the profile pic is still public and available at /userid/picture (see docs at https://developers.facebook.com/docs/graph-api/reference/v2.0/user/picture and this example user: http://graph.facebook.com/v2.2/4/picture?redirect=0) however figuring out a user's standard userid seems impossible based just on their profile - your app would need to get them to approve interaction with the app which for my use case (just showing a profile pic next to their FB profile link) is overkill.

如果有人想出了一种方法来获得基于用户名的个人资料图片，或者，如何获得一个用户id(甚至是一个交替的)来检索个人资料图片，请分享!与此同时，旧的图形url在2015年4月之前仍然有效。

通过这个URL简单地获取数据:

http://graph.facebook.com/userid_here/picture

将userid_here替换为您想获取照片的用户的id。你也可以使用HTTPS。

可以使用PHP的file_get_contents函数读取URL并处理检索到的数据。

资源:

http://developers.facebook.com/docs/api

注意:在PHP .ini中，您需要确保OpenSSL扩展已启用，以便使用PHP的file_get_contents函数读取该URL。

我在想，也许ID会是一个有用的工具。每当用户创建一个新帐户时，它应该获得一个更高的ID。我谷歌了一下，发现有一种方法可以通过ID来估计帐户创建日期，Massoud Seifi从metadatascience.com收集了一些关于它的好数据。

阅读这篇文章:

http://metadatascience.com/2013/03/11/inferring-facebook-account-creation-date-from-facebook-user-id/

下面是一些可以下载的id:

http://metadatascience.com/2013/03/14/lookup-table-for-inferring-facebook-account-creation-date-from-facebook-user-id/

有办法做到这一点;)

感谢“http://it.toolbox.com/wiki/index.php/Use_curl_from_PHP_-_processing_response_headers”:

<?php

    /**
     * Facebook user photo downloader
     */

    class sfFacebookPhoto {

        private $useragent = 'Loximi sfFacebookPhoto PHP5 (cURL)';
        private $curl = null;
        private $response_meta_info = array();
        private $header = array(
                "Accept-Encoding: gzip,deflate",
                "Accept-Charset: utf-8;q=0.7,*;q=0.7",
                "Connection: close"
            );

        public function __construct() {
            $this->curl = curl_init();
            register_shutdown_function(array($this, 'shutdown'));
        }

        /**
         * Get the real URL for the picture to use after
         */
        public function getRealUrl($photoLink) {
            curl_setopt($this->curl, CURLOPT_HTTPHEADER, $this->header);
            curl_setopt($this->curl, CURLOPT_RETURNTRANSFER, false);
            curl_setopt($this->curl, CURLOPT_HEADER, false);
            curl_setopt($this->curl, CURLOPT_USERAGENT, $this->useragent);
            curl_setopt($this->curl, CURLOPT_CONNECTTIMEOUT, 10);
            curl_setopt($this->curl, CURLOPT_TIMEOUT, 15);
            curl_setopt($this->curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
            curl_setopt($this->curl, CURLOPT_URL, $photoLink);

            //This assumes your code is into a class method, and
            //uses $this->readHeader as the callback function.
            curl_setopt($this->curl, CURLOPT_HEADERFUNCTION, array(&$this, 'readHeader'));
            $response = curl_exec($this->curl);
            if (!curl_errno($this->curl)) {
                $info = curl_getinfo($this->curl);
                var_dump($info);
                if ($info["http_code"] == 302) {
                    $headers = $this->getHeaders();
                    if (isset($headers['fileUrl'])) {
                        return $headers['fileUrl'];
                    }
                }
            }
            return false;
        }


        /**
         * Download Facebook user photo
         *
         */
        public function download($fileName) {
            curl_setopt($this->curl, CURLOPT_HTTPHEADER, $this->header);
            curl_setopt($this->curl, CURLOPT_RETURNTRANSFER, true);
            curl_setopt($this->curl, CURLOPT_HEADER, false);
            curl_setopt($this->curl, CURLOPT_USERAGENT, $this->useragent);
            curl_setopt($this->curl, CURLOPT_CONNECTTIMEOUT, 10);
            curl_setopt($this->curl, CURLOPT_TIMEOUT, 15);
            curl_setopt($this->curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
            curl_setopt($this->curl, CURLOPT_URL, $fileName);
            $response = curl_exec($this->curl);
            $return = false;
            if (!curl_errno($this->curl)) {
                $parts = explode('.', $fileName);
                $ext = array_pop($parts);
                $return = sfConfig::get('sf_upload_dir') . '/tmp/' . uniqid('fbphoto') . '.' . $ext;
                file_put_contents($return, $response);
            }
            return $return;
        }

        /**
         * cURL callback function for reading and processing headers.
         * Override this for your needs.
         *
         * @param object $ch
         * @param string $header
         * @return integer
         */
        private function readHeader($ch, $header) {

            //Extracting example data: filename from header field Content-Disposition
            $filename = $this->extractCustomHeader('Location: ', '\n', $header);
            if ($filename) {
                $this->response_meta_info['fileUrl'] = trim($filename);
            }
            return strlen($header);
        }

        private function extractCustomHeader($start, $end, $header) {
            $pattern = '/'. $start .'(.*?)'. $end .'/';
            if (preg_match($pattern, $header, $result)) {
                return $result[1];
            }
            else {
                return false;
            }
        }

        public function getHeaders() {
            return $this->response_meta_info;
        }

        /**
         * Cleanup resources
         */
        public function shutdown() {
            if($this->curl) {
                curl_close($this->curl);
            }
        }
    }

更新:

从2012年8月底开始，API已经更新，允许您检索不同大小的用户头像。添加可选的宽度和高度字段作为URL参数:

https://graph.facebook.com/USER_ID/picture?width=WIDTH&height=HEIGHT

其中WIDTH和HEIGHT是您请求的维度值。

这将返回一个最小宽度x高度的头像，同时尝试保持纵横比。例如,

https://graph.facebook.com/redbull/picture?width=140&height=110

返回

    {
      "data": {
        "url": "https://fbcdn-profile-a.akamaihd.net/hprofile-ak-ash4/c0.19.180.142/s148x148/2624_134501175351_4831452_a.jpg",
        "width": 148,
        "height": 117,
        "is_silhouette": false
      }
   }

最后更新

要获取用户的头像，请呼叫

https://graph.facebook.com/USER_ID/picture

其中USER_ID可以是用户id号或用户名。

要获取特定大小的用户头像，请调用

https://graph.facebook.com/USER_ID/picture?type=SIZE

哪里SIZE应该替换为其中一个单词

square
small
normal
large

这取决于你想要的尺寸。

这个调用将返回一个URL到单个图像，其大小基于您所选择的类型参数。

例如:

https://graph.facebook.com/USER_ID/picture?type=small

返回图像的一个小版本的URL。

API只指定配置文件图像的最大大小，而不是实际大小。

广场:

最大宽度和高度为50像素。

小

最大宽度为50像素，最大高度为150像素。

正常的

最大宽度为100像素，最大高度为300像素。

大

最大宽度为200像素，最大高度为600像素。

如果你调用默认的USER_ID/picture，你会得到方形类型。

澄清

如果你打电话(如上例所示)

https://graph.facebook.com/redbull/picture?width=140&height=110

如果你使用的是Facebook sdk的请求方法，它会返回一个JSON响应。否则它将返回图像本身。要始终检索JSON，添加:

&redirect=false

像这样:

https://graph.facebook.com/redbull/picture?width=140&height=110&redirect=false