> For the complete documentation index, see [llms.txt](https://docs.inspector.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.inspector.dev/guides/codeigniter.md). # CodeIgniter ### Introduction The package automatically instrument a CodeIgniter v4 application and records performance metrics about HTTP requests, DB queries, and Unhandled Exceptions. It also has a simple API which allows you to monitor custom code blocks in your application. ### How does the library works? The library wrap your application execution cycles to measure their duration and metadata (like the DB statements), as well as HTTP related information (like the URL, parameters, headers, etc). These events, called Transactions and Segments, are sent to the ingestion API where they will be processed and stored to provides you with insights into latency issues and error culprits within your application. The first step is to install the Inspector CodeIgniter package: {% content-ref url="/pages/M5N56UUIHZ5mtkgicCNW" %} [Installation](/guides/codeigniter/installation.md) {% endcontent-ref %} ### Resources * Website: * Blog: * GitHub repository: --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.inspector.dev/guides/codeigniter.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.