> For the complete documentation index, see [llms.txt](https://apphp.gitbook.io/build-your-own-llm-in-php/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://apphp.gitbook.io/build-your-own-llm-in-php/3.-creating-attention-mechanisms/page-1.md).

# Page 1