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我正在使用Facebook PHP SDK 3.1.1 此頁面應該從頭文件收集值，稍後將其用於上傳圖像。Facebook應用程序重定向後會丟失會話值
問題：$_SESSION['file']在用戶登錄Facebook後變成null。
<?php
require 'facebook.php';
include('connect.php');
$facebook = new Facebook(array('appId' => "XXXXXX",'secret' => "XXXXX","cookie" => true,'fileUpload' => true));
session_start();
$user_id = $facebook->getUser();
if(isset($_REQUEST["src"]))
{
echo "<center><img src='loader.gif'/></center>";
echo "<center><div id='msg'>Exporting Image..</div></center>";
$_SESSION['file'] = $_REQUEST["src"];
$_SESSION['club'] = $_REQUEST["club"];
}
$code = $_REQUEST["code"];
if(empty($code))
{
$_SESSION['state'] = md5(uniqid(rand(), TRUE));
$dialog_url = "http://www.facebook.com/dialog/oauth?client_id=". $app_id . "&redirect_uri=" . urlencode($my_url) . "&state=". $_SESSION['state'];
echo("<script> top.location.href='" . $dialog_url . "'</script>");
exit();
}
$token_url = "https://graph.facebook.com/oauth/access_token?". "client_id=" . $app_id . "&redirect_uri=" . urlencode($my_url). "&client_secret=" . $app_secret . "&scope=user_photos,email,read_stream,publish_stream&code=".$code;
function url_get_contents ($Url) {
if (!function_exists('curl_init')){
die('CURL is not installed!');
}
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $Url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$output = curl_exec($ch);
curl_close($ch);
return $output;
}
$response = url_get_contents($token_url);
$params = null;
parse_str($response, $params);
$graph_url = "https://graph.facebook.com/me?access_token=". $params['access_token'];
$user = json_decode(url_get_contents('https://graph.facebook.com/me/albums?access_token='.$params['access_token']),true);
foreach($user as $key=>$value)
{
foreach($user[$key] as $key1=>$value1)
{
if($value1['name'] == "Photos")
{
$album_uid = $value1['id'];
}
}
}
if(!isset($album_uid))
{
echo 'Create an album';
$album_details = array(
'message'=> 'Uploaded via XXX',
'name'=> 'Photos'
);
$create_album = $facebook->api('/me/albums', 'post', $album_details);
$album_uid = $create_album['id'];
}
$photo_details = array('message'=>$_SESSION["club"]);
try{
$file = NULL;
$file="../Photos/".$_SESSION['file'].".jpeg";
echo '<script>document.getElementById("msg").innerHTML = "Uploading Image"</script>';
$photo_details['image'] = '@' . realpath($file);
$upload_photo = $facebook->api('/'.$album_uid.'/photos', 'post', $photo_details);
}catch(Exception $e){
echo "<script type='text/javascript'>top.location.href = 'http://www.facebook.com/PAGE_URL/';</script>";
exit();
}
$_SESSION['file']是空
我這樣做對嗎？或者我的虛擬主機有問題？