我如何从访问 php 的最后一页获得 url？

Question

My problem is that, I have a table with values, when I pulse on one of the cells redirect to a cell details page, in the url I pass the id: "http://localhost/example?id=123456". when I back to the previous page with a cancel or save button does redirect to the previous page and get in id with $_SERVER['HTTP_REFERER'] but when you pulse the back button in the browser I don't know how to get that url.

Answer 1

You can use the session system of PHP:

$_SESSION['page'] = $_SERVER['HTTP_REFERER'];

To redirect to the last page you can use the header function.

header("Location: ".$_SESSION['page']);
exit();

Answer 2

On the server-side using $_SERVER['HTTP_REFERER'] is enough and you don;t need to store the value of $_SERVER['HTTP_REFERER'] on $_SESSION too. just directly check the $_SERVER['HTTP_REFERER'] val.

For the client-side, you can use document.referrer in JS. Also, it can be helpful for you to know these functions in JavaScript:

history.back(); //Go to the previous page
history.forward(); //Go to the next page in the stack
history.go(index); //Where index could be 1, -1, 56, etc.

• Notice: If you have some routing system that handles the URL dynamically on the same path ($_POST or...) you may need a more complex solution based on your framework.