应用重定向到Facebook主页

这是我的Facebook应用程序源

<?php
require 'facebook.php';
require 'config.php';
if (isset($_GET['code'])){
  header("Location: " . $canvasPage);
  exit;
}
$fb = new Facebook(array(
                'appId' => 'xxx',
                'secret' => 'xxxx',
                'cookie' => true,
                                'fileUpload' => true,

));
$me = null;
$user = $fb->getUser();
if($user) {
    try {
            $me = $fb->api('/me'); 
    } catch(FacebookApiException $e) {
            error_log($e);
    }
}
//edit the permissions needed
$permsneeded='publish_stream,user_photos';
if ($me){}
else {
    $loginUrl = $fb->getLoginUrl(array(
                'scope' => $permsneeded,
                ));
    echo "
        <script type='text/javascript'>
        window.top.location.href = '$loginUrl';
        </script>
    ";
    exit;
}
if(isset($_GET['signed_request'])) {
    $fb_args="signed_request=". $_REQUEST
    ['signed_request']; }
$signed_request = $_REQUEST["signed_request"];
list($encoded_sig, $payload) = explode(".", $signed_request, 2); 
$data = json_decode(base64_decode(strtr($payload, "-_", "+/")), true); 
if (empty($data["user_id"])) 
{
    echo("");
} 
$access_token   = $data["oauth_token"]; 
try {
$my = $fb->api('/me');
}catch(FacebookApiException $e) {
            error_log($e);
    }
$nam = $my['name'];
    $images = array(
        0 => 'celeb/1.jpg',
        1 => 'celeb/1.jpg',
        3 => 'celeb/1.jpg',
        4 => 'celeb/1.jpg',
        5 => 'celeb/1.jpg',
        6 => 'celeb/1.jpg',
    );
$image = $images[ rand(0,(count($images)-1)) ];
Some other php code
?>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:og="http://opengraphprotocol.org/schema/" >

My Code . 

</html>

我有2个问题。

它重定向到Facebook主页。请参阅演示：https：//apps.facebook.com/246435698815637/
这是" $ image = $ images [rand（0，（count（$ images）-1））];"没有工作一段时间。它没有获得ImageCreatefromjpeg的图像

尝试这样的尝试，请避免使用空白。

if(!($me)) 
{
    echo '<script> top.location.href="'.$facebook->getLoginUrl(array(
                    'req_perms' => $permsneeded,
                    'next' =>'https://apps.facebook.com/246435698815637/',
                    )). '";
          </script>';
    exit();
}

和第二个是正确的，它应该可以起作用，但是我对imagecreatefromjpeg不了解，因为您不提供任何信息。Div>

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