Facebook PHP SDK 与 getLoginUrl() 相关的问题
我在使用 getLoginUrl() 登录 PHP SDK 时遇到问题。当用户单击该函数生成的链接时，它不会显示权限对话框，而是显示 Facebook 徽标，您必须在显示权限对话框之前单击它，请帮助我！
I am having a trouble with PHP SDK logging in using getLoginUrl(). when the user click the link generated by that function it does not show the permission dialog instead it shows a facebook logo you must click it before showing the permission dialog please help me!
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显示 Facebook 徽标是因为您的应用程序正在尝试在 iframe 中加载身份验证对话框，这是 OAuth 2.0 不允许的。相反，您的应用程序必须在 _parent 或 _top 或弹出窗口中加载身份验证对话框，这就是您单击 Facebook 徽标时发生的情况。
答案将取决于您的应用程序如何允许用户启动身份验证过程。
许多人都有这样的例子：
大多数人抱怨步骤 3 有显示 Facebook 徽标的“额外”步骤。
解答：更改您的链接：
从：
到：
[有多种方法可以完成您所要求的任务，此答案显示了人们似乎问得最多的一个，如果这不适用，您将需要提供更多详细信息]
The Facebook logo is showing because your app is attempting to load the auth-dialog within the iframe, which is not allowed by OAuth 2.0. Instead your app must load the auth-dialog in the _parent or _top or in pop-out-window which is what happens when you click on the Facebook logo.
The answer will depend on how your app allow users to start the authentication process.
An example many have is:
Most people complain that step 3 has the "extra" step of showing the facebook logo.
ANSWER: Change your link:
FROM:
<a href="<?=$loginUrl?>">TO:
<a target="_top" href="<?= $loginUrl ?>[there are several ways to accomplish what you are asking, this answer shows the one people seem to ask about the most, you would need to provide more details if this does not apply]
与大多数 oAuth 一样，Facebook 不允许用户通过 iframe 登录。
Facebook does not allow the user to login via an iframe, as with most oAuth.