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我不知道标题位置部分有什么问题，但是由于哪个页面会无限重定向并在某个时间后停止而出现一些错误。这是我的代码，当我选择一个图片以便它应该重定向到 facebook 时覆盖或制作个人资料页面，但它会一直循环重定向。 

<?php
include_once("inc/facebook.php"); //include facebook api library

######### edit details ##########
$appId = ''; //Facebook App ID
$appSecret = ''; // Facebook App Secret
$return_url = 'http://www.mysite.com/testing/process.php';  //return url (url to script)
$homeurl = 'http://www.mysite.com/testing';  //return to home
$fbPermissions = 'publish_stream,user_photos';  //Required facebook permissions
##################################



$GetPicId = $_GET["pid"]; // Picture ID from Index page
$PicLocation ='';

/*
Users do not need to know original location of image.
I think it's better to get image location from database using ID.
for demo here i'am using PHP switch.
*/
switch($GetPicId)
{
case 1:
    $PicLocation = 'cover_pics/cover1.jpg';
    break;
case 2:
    $PicLocation = 'cover_pics/cover2.jpg';
    break;
case 3:
    $PicLocation = 'cover_pics/cover3.jpg';
    break;
default:
    header('Location: ' . $homeurl);
    break;
}

//Call Facebook API
$facebook = new Facebook(array(
'appId'  => $appId,
'secret' => $appSecret,
'fileUpload' => true,
'cookie' => true
));

//get user
$fbuser = $facebook->getUser();
$access_token = $facebook->getAccessToken();

//variables we are going to post to facebook
$msg_body = array(
'access_token' => $access_token,
'message' => 'I liked this pic from '. $homeurl .' it is perfect for my cover photo.',
'source' => '@'.realpath($PicLocation)
);

if ($fbuser){ //user is logged in to facebook, post our image
try {
$uploadPhoto = $facebook->api('/me/photos', 'post', $msg_body );
} catch (FacebookApiException $e) {
echo $e->getMessage(); //output any error
}
}else{
$loginUrl =   $facebook->getLoginUrl(array('scope'=>$fbPermissions,'return_url'=>$return_url));
header('Location: ' . $loginUrl);
}

if($uploadPhoto)
{
/*
image is posted in user facebook account, but still we need to send user to facebook
so s/he can set cover or profile picture!
*/

//Get url of the picture just uploaded in user facebook account
$jsonurl = "https://graph.facebook.com/".$uploadPhoto["id"]."&?access_token=".$access_token;
$json = file_get_contents($jsonurl,0,null,null);
$json_output = json_decode($json);

/*
We can not set facebook cover or profile picture automatically yet,
So, the trick is to post picture into user facebook account first
and then redirect them to a facebook profile page where they just have to click a button to set it.
*/
echo '<html><head><title>Update Image</title>';
echo '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
echo '<link href="style.css" rel="stylesheet" type="text/css" />';
echo '</head><body>';
echo '<div align="center" class="fbpicwrapper">';
echo '<h1>Image is sent to your facebook account!</h1>';
echo '<div class="fbpic_desc">Click on desired button you want to do with this image!</div>';
echo '<div class="option_img"><img src="'.$json_output->source.'" /></div>';

/*
Links (buttons) below will send user to facebook page,
where they just need to crop or correct propertion of image and hit apply button.
*/
echo '<a class="button" target="_blank" href="http://www.facebook.com/profile.php?preview_cover='.$uploadPhoto["id"].'">Make Your Profile Cover</a>';
echo '<a class="button" target="_blank" href="http://www.facebook.com/photo.php?fbid='.$uploadPhoto["id"].'&type=1&makeprofile=1&makeuserprofile=1">Make Your Profile Picture</a>';
echo '<a class="button" href="'.$homeurl.'">Back to main Page.</a>';
echo '</div>';
echo '</body></html>';
}

?>
4

2 回答 2

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您正在使用header2 行中的方法，该方法可以在 2 次中由某些真实条件运行。它可以形成一个循环。

如果switch不匹配任何情况，也$fbuser等于false同时。

第header一种方法：

default:
    header('Location: ' . $homeurl);
    exit(); //added
    break;

其他header方法：

if ($fbuser){ 
    //user is logged in to facebook, post our image
}
else {
    $loginUrl = $facebook->getLoginUrl(array('scope' => $fbPermissions, 'return_url' => $return_url));
    header('Location: ' . $loginUrl);
    exit(); //added
于 2013-08-25T06:11:41.563 回答
0

echo在使用header(Location...)重定向之前删除打印到输出的任何或任何空格。在您已经开始打印以输出之后，重定向将不起作用。

这样做的方法是将要打印的所有内容保存到字符串中，以防万一没有重定向，并仅在最后将其打印到屏幕上。

于 2013-08-25T06:05:58.773 回答