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POAuthorize and PHP-Session
 

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  1. POAuthorize and PHP-Session
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    <p>I'm trying to find a solution for hours - without success. So I hope that maybe one of you can help me with this: It seems like this script allways starts a new session - and I don't know why.</p> <pre><code>&lt;?php $code = $_REQUEST["code"]; if(empty($code)) { $_SESSION['state'] = md5(uniqid(rand(), TRUE)); $dialog_url = "https://www.facebook.com/dialog/oauth?client_id=" . $app_id . "&amp;redirect_uri=" . urlencode($my_url) . "&amp;state=" . $_SESSION['state']. "&amp;scope=publish_actions,publish_stream"; echo("&lt;script&gt; top.location.href='" . $dialog_url . "'&lt;/script&gt;"); } if($_SESSION['state'] &amp;&amp; ($_SESSION['state'] === $_REQUEST['state'])) { $token_url = "https://graph.facebook.com/oauth/access_token?" . "client_id=" . $app_id . "&amp;redirect_uri=" . urlencode($my_url) . "&amp;client_secret=" . $app_secret . "&amp;code=" . $code; $response = file_get_contents($token_url); $params = null; parse_str($response, $params); $_SESSION['access_token'] = $params['access_token']; } else { echo("Sessionstate: ".$_SESSION['state']."&lt;br&gt;"); echo("REQUEST_state: ".$_REQUEST['state']."&lt;br&gt;"); echo("Sessionstatus stimmt nicht mit dem REQUEST_State &amp;uuml;berein."); var_dump ($_REQUEST); exit; } ?&gt; </code></pre> <p>The session starts in an included file before this script is included with a regular: </p> <pre><code> session_start(); </code></pre> <p>I tried to pass the "state" with </p> <pre><code> &lt;form action="&lt;?=$_SERVER['PHP_SELF'];?&gt;?what=save&amp;state=&lt;?=$_SESSION['state'];?&gt;" method="post" enctype="multipart/form-data"&gt; </code></pre> <p>from my index.php file.</p> <p>Thanks for reading and for helping me.</p> <p>Regards Christian.</p> <p>Edit: Here's the link to the developer-blog: <a href="https://developers.facebook.com/blog/post/2011/05/13/how-to--handle-expired-access-tokens/" rel="nofollow">https://developers.facebook.com/blog/post/2011/05/13/how-to--handle-expired-access-tokens/</a></p>
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    1. CODon't use `$_SERVER['PHP_SELF'];` in this way. See: http://stackoverflow.com/questions/6080022/php-self-and-xss
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