在 Facebook 注册有时不提供电子邮件 [英] Register with Facebook sometimes doesn't provide email

问题描述

我使用在 Facebook 注册作为登录我的网络应用程序的一种方式，并明确要求电子邮件"许可..

I'm using Register with Facebook as one of the ways to log in to my web app, and expressly ask for the "email" permission..

登录时，一些用户数据 ($facebook->api('/me')) 存储到用户数据库中，但是，有时电子邮件字段不存在- 这是一个常见问题吗?

On login, some of the user data ($facebook->api('/me')) is stored into the users database, however, sometimes the email field just doesn't exist - is this a common problem?

推荐答案

只是猜测...

Facebook 文档说:

The facebook documentation says:

注意:如果用户没有可用的有效电子邮件地址，则不会返回此字段

note: this field will not be returned if no valid email address is available for the user

来源:https://developers.facebook.com/docs/reference/api/user/

因此，当电子邮件地址无效时(例如，多年未使用 facebook 并已销毁/更改其电子邮件地址的用户)，facebook 可能会停止返回此字段.

So when an email address become invalid (users who haven't used facebook in years and have destroyed/changed their email address since for example), facebook may stop returning this field.

5% 的无效地址听起来可能很大，但如果我查看我的 facebook 好友，我认为其中超过 5% 的人从不使用他们的帐户，如果他们登录时使用的地址是现在无效.

5% of invalid address may sounds big, but if I check my facebook friends, I think more than 5% of them never use their account, and I wouldn't be surprised if the address they used when they signed in is now invalid.

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