在JavaScript（或任何其他）重定向之后存储php变量

Question

I am trying to do the following:

A parent (called A) is used to access iframe of another application (called B) within the same domain. I don't want the B to be accessed directly, only through parent A.

Content of example.com/parentA:

<iframe id="childB" src="http://example.com/childB"></iframe>

I've managed to redirect any URL from child B to parent A page with simple:

if (!window.frameElement) {
  window.location = "http://example.com/parentA"
}

and store the URL within PHP variable (still in child B):

$redirect_to = "http://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";

Obviously, once redirected the variable is lost and I am stuck on always redirecting to /parentA/ with fixed src. My goal is the following:

<iframe id="childB" src="<?php if (isset($redirect_to)){ echo $redirect_to; }else{ echo 'http://example.com/childB'; } ?>"></iframe>

I've no idea how to store $redirect_to upon redirecting. Through a cookie? Is my approach viable in the least?

Answer 1

You can maintain a session storage variable(https://developer.mozilla.org/en-US/docs/Web/Guide/API/DOM/Storage) and delete it once work is done, this way you will access to the target path and at the same time maintain the security as well.