我试图登录电子的JavaScript使用Ajax创建FB，PHP。 它的工作原理，并从Facebook获取所需的数据。 但是，一旦用户点击登录，然后登录完成后，页面重新加载得到两次beofre显示数据。 这里是我的代码。 任何人都可以指出哪里是错误或什么联系呢？
<?php
session_start();
$appId = '669340023079549';
$appSecret = '390c04c60d19f38e113ea44f268aca44'; // Facebook App Secret
$return_url = 'http://yoursite.com/connect_script/'; //path to script folder
$fbPermissions = 'publish_stream,email'; //more permissions : https://developers.facebook.com/docs/authentication/permissions/
?>
<!DOCTYPE html>
<html xmlns:f b="http://www.facebook.com/2008/fbml" xml:lang="en-gb" lang="en-gb" ><head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js" type="text/javascript"></script>
<title>JS/Ajax Facebook Connect</title>
<script>
function AjaxResponse()
{
// alert("4");
var myData = 'connect=1'; //For demo, we will pass a post variable, Check process_facebook.php
$.ajax({
type: "POST",
url: "process_facebook.php",
dataType:"html",
data:myData,
success:function(response){
// alert(response);
$("#results").html('<fieldset style="padding:20px">'+response+'</fieldset>'); //Result
}, error:function (xhr, ajaxOptions, thrownError){
$("#results").html('<fieldset style="padding:20px;color:red;">'+thrownError+'</fieldset>'); //Error
} }); }
function LodingAnimate() //Show loading Image
{
//alert("3");
$("#LoginButton").hide(); //hide login button once user authorize the application
$("#results").html('<img src="ajax-loader.gif" /> Please Wait Connecting...'); //show loading image while we process user
}
</script></head><body>
<?php
if(!isset($_SESSION['logged_in']))
{
?>
<div id="results"> </div>
<div id="LoginButton">
<div class="fb-login-button" onlogin="return CallAfterLogin();" size="medium" scope="<?php echo $fbPermissions; ?>">Connect With Facebook</div>
</div>
<?php
}
?>
<div id="fb-root"></div>
<script type="text/javascript">
window.fbAsyncInit = function() {
// alert("1");
FB.init({
appId: '<?php echo $appId; ?>',
cookie: true,
xfbml: true,
channelUrl: '<?php echo $return_url; ?>channel.php',
oauth: true});};
(function() {
var e = document.createElement('script');
e.async = true;e.src = document.location.protocol +'//connect.facebook.net/en_US/all.js';
document.getElementById('fb-root').appendChild(e);
}());
function CallAfterLogin(){
//alert("2");
FB.login(function(response) {
if (response.status === "connected")
{
LodingAnimate(); //Animate login
FB.api('/me', function(data) {
if(data.email == null)
{
//Facbeook user email is empty, you can check something like this.
alert("You must allow us to access your email id!");
ResetAnimate();
}else{
AjaxResponse();
}
});
}
return true;
});
}
</script>
</body>
</html>
