# Meaning of ":fn" in the end of URL

**URL:** https://discourse.nodered.org/t/meaning-of-fn-in-the-end-of-url/61836
**Category:** General
**Tags:** http-request
**Created:** [27 April 2022 04:29 UTC](https://discourse.nodered.org/t/meaning-of-fn-in-the-end-of-url/61836 "2022-04-27T04:29:38Z")
**Posts on this page:** 6
**Page:** 1

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### Author: ![Kai](https://avatars.discourse-cdn.com/v4/letter/k/cc9497/32.png) [@Kai](https://discourse.nodered.org/u/Kai)
#### Post date: [27 April 2022 04:29 UTC](https://discourse.nodered.org/t/meaning-of-fn-in-the-end-of-url/61836/1 "2022-04-27T04:29:38Z")

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Hi,

I ever saw someone will put the words ":fn" in the end of URL

may I know what does it means?

![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/9/2/926244ef651b12b011c8adb09ecdad2501b9e9a3.png)

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### Author: ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [27 April 2022 05:39 UTC](https://discourse.nodered.org/t/meaning-of-fn-in-the-end-of-url/61836/2 "2022-04-27T05:39:04Z")

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It means `fn` will be a path element that you can access in the msg. Useful for providing multiple paths. read the nodes built in help.

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### Author: ![michaelblight](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/michaelblight/32/445_2.png) [@michaelblight](https://discourse.nodered.org/u/michaelblight)
#### Post date: [27 April 2022 05:43 UTC](https://discourse.nodered.org/t/meaning-of-fn-in-the-end-of-url/61836/3 "2022-04-27T05:43:13Z")

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That's how you can unpack a variable from the url. So if the url is "/wakanda/123", then message will have a `req.params`with `{ "fn": "123" }`.

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### Author: ![Kai](https://avatars.discourse-cdn.com/v4/letter/k/cc9497/32.png) [@Kai](https://discourse.nodered.org/u/Kai)
#### Post date: [27 April 2022 06:59 UTC](https://discourse.nodered.org/t/meaning-of-fn-in-the-end-of-url/61836/4 "2022-04-27T06:59:22Z")

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thanks, now I get the concept of it

thanks for your help :))

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### Author: ![Kai](https://avatars.discourse-cdn.com/v4/letter/k/cc9497/32.png) [@Kai](https://discourse.nodered.org/u/Kai)
#### Post date: [27 April 2022 07:00 UTC](https://discourse.nodered.org/t/meaning-of-fn-in-the-end-of-url/61836/5 "2022-04-27T07:00:57Z")

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understood, thanks for your help 👌

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### Author: ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)
#### Post date: [26 June 2022 07:01 UTC](https://discourse.nodered.org/t/meaning-of-fn-in-the-end-of-url/61836/6 "2022-06-26T07:01:51Z")

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