PHP使用$ _SERVER ['HTTP_REFERER']创建反向链接

Question

Is it safe to create a back link with:

$backLink = htmlentities($_SERVER['HTTP_REFERER']);

or is there a better solution?

Answer 1

An easier way might be to do something like this:

<a href="javascript:history.back()">Go back</a>

That does not rely on the browser populating the Referer header, but instead does exactly the same thing as pressing the browser "Back" button.

This may be considered better since it actually goes back in the browser history, instead of adding the previous page to the browser history in the forward direction. It acts just as you would expect the Back button to act.