---
title: querystring.globfilter_except
summary: null
url: >-
  https://www.fastly.com/documentation/reference/vcl/functions/query-string/querystring-globfilter-except
---

```
STRING querystring.globfilter_except(STRING url, STRING pattern)
```

**Available in:** all subroutines

Returns the given URL but only keeps the parameters matching a glob.

## Example

```vcl
set req.url = querystring.globfilter_except(req.url, "sess*");
```