Wordpress在页面之间传递查询参数

Question

I would like to pass query string parameters from one page to another in wordpress. The problem im facing is wordpress always removes the ?get queries everytime a new page loads - hence there's no way i can pass the parameters.

Ideal flow ==>

Affiliate sends traffic to my domain using link:

http://domain.com/pricing/?id=123&no=456

User lands on this website and starts reading. User then decides to navigate to eg the "about-us" section by clicking somewhere on the page's menu.

User then gets redirected to domain.com/about-us

[(query string parameters) got stripped!]

What can I do to make sure the query parameters stay?

What can i do to get the user redirected to domain.com/about-us/?id=123&no=456 ?

In general, I wish that the whole query string "?id=123&no=456" can be passed from one page to another, until user closes the window.

I'm trying to be as clear as I can but I apologise if I'm not explaning too well on this!

Appreciate if anyone can lend a helping hand! all forms (keep it simple please) of answers will be appreciated!

Answer 1

Add this to your functions.php:

function append_query_string($url) {
    return add_query_arg($_GET, $url);
}
add_filter('the_permalink', 'append_query_string');

https://codex.wordpress.org/Plugin_API/Filter_Reference/the_permalink