In PHP, `$_SERVER['HTTP_REFERER']` is a server-side variable that retrieves the value of the `Referer` header from the HTTP request made by the client to the server. The `Referer` header contains the URL of the page that the user navigated from to reach the current page. This variable is typically used to track the source of traffic and can be helpful in implementing certain features such as redirecting users back to the previous page or analyzing the effectiveness of marketing campaigns. However, it should be noted that this variable is provided by the client and can be easily manipulated or disabled, so it should not be relied upon as a completely reliable source of information.
PHP Request::referrer - 11 examples found. These are the top rated real world PHP examples of Request::referrer from package someline-starter extracted from open source projects. You can rate examples to help us improve the quality of examples.