使用Facebook php sdk时出现Facebook登录错误

您好，我正在使用PHPSDK登录facebook&我收到以下错误，有人能帮忙吗？对不起，代码不清楚。 另外，如果用户已经登录，那么它也不会加载其名称和配置文件图片。这个名为example.php的文件的代码取自github&只是输入了我的应用程序id secret。有人知道这件事吗

 FacebookApiException Object
(
[result:protected] => Array
    (
        [error_code] => 7
        [error] => Array
            (
                [message] => couldn't connect to host
                [type] => CurlException
            )
    )
[message:protected] => couldn't connect to host
[string:private] =>
[code:protected] => 7
[file:protected] => /home/a8550571/public_html/base_facebook.php
[line:protected] => 994
[trace:private] => Array
    (
        [0] => Array
            (
                [file] => /home/a8550571/public_html/base_facebook.php
                [line] => 913
                [function] => makeRequest
                [class] => BaseFacebook
                [type] => ->
                [args] => Array
                    (
                        [0] => https://graph.facebook.com/me
                        [1] => Array
                            (
                                [method] => GET
                                [access_token] => ************|************

  [appsecret_proof] =>   c98c73087d558dfdf19f111980c158123d7c6e1e92fbb47e6705b85d9b149612
                            )
                    )
            )
        [1] => Array
            (
                [file] => /home/a8550571/public_html/base_facebook.php
                [line] => 876
                [function] => _oauthRequest
                [class] => BaseFacebook
                [type] => ->
                [args] => Array
                    (
                        [0] => https://graph.facebook.com/me
                        [1] => Array
                            (
                                [method] => GET
                            )
                    )
            )
        [2] => Array
            (
                [file] => /home/a8550571/public_html/base_facebook.php
                [line] => 654
                [function] => _graph
                [class] => BaseFacebook
                [type] => ->
                [args] => Array
                    (
                        [0] => /me
                    )
            )
        [3] => Array
            (
                [file] => /home/a8550571/public_html/Face.php
                [line] => 13
                [function] => api
                [class] => BaseFacebook
                [type] => ->
                [args] => Array
                    (
                        [0] => Array
                            (
                                [0] => Facebook Object
                                    (
                                        [sharedSessionID:protected] =>
                                        [appId:protected] => ****************
                                        [appSecret:protected] => ******************
                                        [user:protected] => 100002201193039

       [signedRequest:protected] => Array
                                            (

       [algorithm] => HMAC-SHA256

                                                [code] => AQDUD--0eoklv5v79yX18z14ATMSjwYD-jaYb3dKKchVJt9TR9iLLnPd6GisLDSCyHX8ryE_3ZAFHBz6eblRgpmg385NHQyCGUcrfOshrUwPBvKccTeqp-5qgBaTy7FtpwPcA1Es-D0R2WxGrWcDsmCXGlEff8BlnqG7zci2Ziq7El1yqRM69JsSQPfMw6C41jFnbhJe38mtE92rnHMfKC_CIpipnvZWe29xnGUJ602Rh2qbQoDAfsHuBYOh0avZ_GiHScR4oaCeT289q0_ibrrc-NrV2DTZz-ld80DjZLQHtGJC9_fboV-XocKsPbhGn1u2B6N76KYxsR-0fFH2vRQ-

                             [issued_at] =>   1378744697

                  [user_id] =>   100002201193039
                                            )
                                        [state:protected] => 3eaaeacc35d80f8f3a641c7ea272c2f5

      [accessToken:protected] => ****************|***************

                [fileUploadSupport:protected] =>

                    [trustForwarded:protected] =>
                                    )
                                [1] => _graph
                            )
                        [1] => Array
                            (
                                [0] => /me
                            )
                    )
            )
    )

)

---

false

似乎没有人知道这一点？不，我什么都不懂，可能不是唯一一个。很简单，facebook php sdk在我的网站上不起作用。我用我的应用程序id&secret编辑了该文件。虽然它不起作用。它不显示用户使用Facebook登录到我的网站。我现在清楚了吗？有什么帮助吗？