如何从Yahoo或Gmail获取HTTP_REFERER
我有一个电子邮件脚本，该脚本将带有链接的邮件发送到Yahoo或Gmail，该链接将在单击时返回到我的网站.
I have an e-mailer script that send messages to Yahoo or Gmail with a link on it, a link that will return back to my website when it is clicked.
我需要从Yahoo或Gmail获取HTTP_REFERER.在我的网站上
I need to get the HTTP_REFERER from Yahoo or Gmail. in my site I have
echo $ _SERVER ["HTTP_REFERER"];
echo $_SERVER["HTTP_REFERER"];
期待一些回报.但它是空的.
expecting something to return on it. but its empty.
这似乎是设计使然.可以使用Javascript恶作剧删除标头.来自 Google关于GMail隐私的文档:
This seems to be by design. It is possible to remove the header using Javascript shenanigans. From Google's docs on GMail privacy:
最少的引荐来源"标头信息.当您单击消息中的链接时，加载的Web浏览器将包含引荐来源标头.当您单击Gmail中的链接时，Google会采取措施消除此引荐来源标头，以防止其他人知道您单击了电子邮件中的链接.
Minimized "referrer" header information. When you click on links in messages, the web browser that loads contains a referrer header. When you click on links in Gmail, Google takes steps to eliminate this referrer header, preventing others from knowing that you clicked on a link from an email.