URL param transformation

[taylor-onfido]

Summary

I have the following setup:

When I visit this url: /blog/?category[0]=6

It is transformed into /resources-2/?category0[]=6

Any idea why this is happening?

Environment

Browser: Chrome
Browser Version: Version 130.0.6723.92 (Official Build) (arm64)
WordPress Version: 6.7
Redirection Version: 5.5

[taylor-onfido]

Also, I'm sorry for posting this here. My client is on WP Engine. Therefore, I can't log in and post to Matt's website.

[vaz]

Your screenshot comtains the complete story.

Source and target URL you understand. /blog/ to /resources-2/ as expected.

The option in between says "Query params: Ignore and pass parameters to the target".

Let's pick that apart to interpret it, there are two things being said, "ignore" and "pass to target".

• The ignore part is about matching a URL to the Source. When a request comes in, any query param is ignored while checking if it matches the Source defined here.
  ** /blog/, /blog/?abc=123 and /blog/?utm_source=facebook.com all match this rule's Source /blog/ because of the ignore part.
• The redirect location is usually just the Target written here.
• • but the "and pass parameters to the target" part of that option means, those query params you ignored while matching against Source, hold on to them actually and just re-append them to the target.

So your rule does exactly what it says it does. Matches a URL /blog/ with any query parameter (including none), redirects to /resources-2/ but also passes query params from original URL to the new target URL.

/blog/ becomes /resources-2/. /blog/?abc=123 becomes /resources-2/?abc=123. It's working as designed.

[vaz]

In other words check that option dropdown to find a behaviour matching what you really wanted.

[taylor-onfido]

It's not the complete story though. Why are the params transformed from category[0]=6 to category0[]=6