你如何在 PHP 中获得“referer”标头？
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How do you get the 'referer' header in PHP?
提问by Abdulsattar Mohammed
I want the the url of the page from which a request has been made. How can I do that in PHP?
我想要发出请求的页面的 url。我怎样才能在 PHP 中做到这一点？
回答by Stefan Gehrig
The refer(r)er can be found in the $_SERVERglobal variable. Please note that sending the refer(r)er is completely optional and a user-agent can simply decide to not send the refer(r)ing url.
引用(r)er 可以在$_SERVER全局变量中找到。请注意，发送refer(r)er 是完全可选的，用户代理可以简单地决定不发送refer(r)ing url。
$_SERVER['HTTP_REFERER']
