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POFacebook asking for permissions and authentication
 

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  1. POFacebook asking for permissions and authentication
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    <p>I am currently making a facebook app and am having some problems with permissions. I need permission from each user to use there location and there friends locations. The code I have has worked in the past but recently seems to have stopped working. Assume my app_id and app_namespace are declared. All that happens is I am redirected to the dialog_url in the if(empty($code)) block, but to my knowledge $code should not be empty. Any help would be greatly appreciated. Thanks.</p> <pre><code>require_once('sdk/src/facebook.php'); require_once('AppInfo.php'); require_once('utils.php'); require_once('connection.php'); $facebook = new Facebook(array( 'appId' =&gt; AppInfo::appID(), 'secret' =&gt; AppInfo::appSecret(), )); $user_id = $facebook-&gt;getUser(); if(user has ran the app before) { mysql_close($connection); session_start(); $_SESSION['state'] = md5(uniqid(rand(), TRUE)); //CSRF protection $dialog_url = "http://www.facebook.com/dialog/oauth?client_id" . $app_id . "&amp;redirect_uri=" . urlencode($my_url2) . "&amp;state=" . $_SESSION['state']; echo("&lt;script&gt; top.location.href='" . $dialog_url . "'&lt;/script&gt;"); } else { mysql_close($connection); session_start(); $code = $_REQUEST["code"]; if(empty($code)) { $_SESSION['state'] = md5(uniqid(rand(), TRUE)); //CSRF protection $dialog_url = "http://www.facebook.com/dialog/oauth?client_id" . $app_id . "&amp;redirect_uri=" . urlencode($my_url) . "&amp;scope= user_location, friends_location, offline_access" . "&amp;state=" . $_SESSION['state']; echo("&lt;script&gt; top.location.href='" . $dialog_url . "'&lt;/script&gt;"); } if($_REQUEST['state'] == $_SESSION['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); $graph_url = "https://graph.facebook.com/me?access_token" . $params['access_token']; $user = json_decode(file_get_contents($graph_url)); echo("Hello " . $user-&gt;name); } else { echo("The state does not match. You may be a victim of CSRF."); } } </code></pre>
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