> For clean Markdown content of this page, append .md to this URL. For the complete documentation index, see https://buildwithfern.com/learn/llms.txt.

## PHP filter for llms.txt and Markdown output

ai

You can now pass `lang=php` to `/llms.txt` and to per-page `.md` and `.mdx` URLs to return only PHP SDK code examples. `php` joins `node`, `python`, `java`, `ruby`, `go`, `csharp`, and `swift` as accepted values for the `lang` query parameter.

**`Example`**

```txt Example
/llms.txt?lang=php
/plants/create-plant.md?lang=php
```

Read the docs

## Exclude changelogs from llms.txt

ai

You can now omit changelog sections from `llms.txt` by adding the `excludeChangelog=true` query parameter. This keeps the index small for sites with long release histories. It combines with the existing `lang` and `excludeSpec` parameters, for example `/llms.txt?lang=python&excludeSpec=true&excludeChangelog=true`.

Read the docs

## More page suggestions in agent 404 responses

ai

Requests for a nonexistent `.md` URL now return up to five "Similar pages" suggestions instead of three, so agents on large sites are more likely to find the page they were looking for.

Read the docs