我正在开发我的第一个 facebook fanpage 应用程序，并在同一页面上处理注册表单。
该应用程序的工作原理如下：
- 检查 facebook 用户是否登录 -> 如果没有，要求登录，如果是，将基本用户数据记录到我的数据库 table1 (mysql)，
- 检查用户是否喜欢我的 facebook 页面 -> 如果不喜欢，要求点击喜欢按钮，如果是则继续下一步，
- 检查我的数据库 table2 中是否已经存在用户数据-> 如果没有，则打印出注册表并将其发送到同一页面以在 mysql 中进行处理
- 当用户注册后，实际的独家内容应该显示给用户。
我的问题是，在发送注册表单后，用户返回“非粉丝”区域（尽管他已经喜欢该页面，因此应该看到仅限粉丝的内容）并且“错误”一词被打印到顶部这页纸。-> 这意味着页面开头的“isset($_REQUEST['signed_request'])”返回false。
这是我的代码：
<?php
require '../facebook-php-sdk/src/facebook.php';
$facebook = new Facebook(array(
'appId' => 'fb-app-id',
'secret' => 'fb-app-secret',
'cookie' => true,
));
$user = $facebook->getUser();
function saveuser(&$id, &$name, &$email, &$ip, $hostname, $browser, &$like) {
mysql_connect('host', 'user', 'password');mysql_set_charset('utf8');mysql_select_db('mydatabase');
mysql_query("INSERT INTO mytable1 (id,name,email,ip,hostname,browser,fblike) VALUES ($id, '$name', '$email', '$ip', '$hostname', '$browser', $like)");
mysql_close();
}
function checkuser(&$id) {
mysql_connect('host', 'user', 'password');mysql_set_charset('utf8');mysql_select_db('mydatabase');
$query="SELECT phone, round, points FROM mytable2 WHERE fbuserid = " .$id. " ORDER BY timecreated DESC LIMIT 1";
$result=mysql_query($query);
mysql_close();
return $result;
}
?>
<html><head><title>page title</title></head>
<body>
<?php
if (isset($_REQUEST['signed_request'])) {
$encoded_sig = null;
$payload = null;
list($encoded_sig, $payload) = explode('.', $_REQUEST['signed_request'], 2);
$sig = base64_decode(strtr($encoded_sig, '-_', '+/'));
$signed_request = json_decode(base64_decode(strtr($payload, '-_', '+/'), true),true);
} else { echo "ERROR"; }
if ($signed_request['page']['liked']) { $like = 1; } else { $like = 0; }
if ($user) { try {
$user_profile = $facebook->api('/me','GET');
$name = $user_profile['name'];
$email = $user_profile['email'];
$id = $user_profile['id'];
$ip = $_SERVER['REMOTE_ADDR'];
$hostname = gethostbyaddr($ip);
$browser = $_SERVER['HTTP_USER_AGENT'];
saveuser($id, $name, $email, $ip, $hostname, $browser, $like);
} catch(FacebookApiException $e) {
?>
<script type="text/javascript">
//<![CDATA[
var oauth_url = 'https://www.facebook.com/dialog/oauth/';
oauth_url += '?client_id=fb-app-id';
oauth_url += '&redirect_uri=' + encodeURIComponent('https://www.facebook.com/fb-page-name?sk=app_fb-app-id');
oauth_url += '&scope=email'
window.top.location = oauth_url;
//]]>
</script>
<?php } } else { // User not logged in or we need user permission ?>
<script type="text/javascript">
//<![CDATA[
var oauth_url = 'https://www.facebook.com/dialog/oauth/';
oauth_url += '?client_id=fb-app-id';
oauth_url += '&redirect_uri=' + encodeURIComponent('https://www.facebook.com/fb-page-name?sk=app_fb-app-id');
oauth_url += '&scope=email'
window.top.location = oauth_url;
//]]>
</script>
<?php }
if ($like == 1) { // user is fan of my facebook page
$userdata = checkuser($id);
if (mysql_num_rows($userdata) > 0) { // user is registered
$userphone=mysql_result($userdata,0,telefon);
$roundscompleted=mysql_result($userdata,0,round);
$currentpoints=mysql_result($userdata,0,points);
?>
Here comes extended html content visible only for users who have liked my page and completed the registration form.
<?php } else { // user is not registered
if ($_POST['emailaddress'] != "") { // process user registration
mysql_connect('host', 'user', 'password');mysql_set_charset('utf8');mysql_select_db('mydatabase');
$id = $_POST['fbuserid'];
$name = mysql_real_escape_string($_POST['fullname']);
$email = mysql_real_escape_string($_POST['emailaddress']);
$mobile = mysql_real_escape_string($_POST['phonenumber']);
mysql_query("INSERT INTO mytable2 (fbuserid,regname,regemail,telefon) VALUES ('$id', '$name', '$email', '$mobile')");
mysql_close();
/*
On this point, the page should be reloaded and checkuser() function should return user data.
What happens is "ERROR" gets printed on top of page and user gets back to the "non-fan area".
*/
} else { // user not registered - print registration form ?>
<form id="regisztracio" name="regisztracio" method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>">
<fieldset><legend>Registration form</legend>
<label>Your name</label>
<input type="text" name="fullname" id="fullname" value="<?php echo $name; ?>" />
<br style="clear:both;" />
<label>Your e-mail</label>
<input type="text" name="emailaddress" id="emailaddress" value="<?php echo $email; ?>" />
<br style="clear:both;" />
<label>Your phone number</label>
<input type="text" name="phonenumber" id="phonenumber" />
<br style="clear:both;" />
<input name="fbuserid" type="hidden" value="<?php echo $id; ?>" />
<input name="submitreg" type="submit" class="submit" value="Register" />
</fieldset></form>
<?php } } } else { // non-fan area ?>
Here comes basic html content asking the user to click on the like button and become a fan of my facebook page.
<?php } ?>
</body>
</html>
非常感谢您的帮助！