> For the complete documentation index, see [llms.txt](https://php-fhir-tools.ardenexal.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://php-fhir-tools.ardenexal.net/readme.md).

# Introduction

PHP toolkit for FHIR — code generation, serialization, validation, and FHIRPath.

PHP FHIR Tools is a PHP 8.3+ library monorepo for working with [FHIR](https://www.hl7.org/fhir/) (Fast Healthcare Interoperability Resources). FHIR is the HL7 standard for exchanging healthcare data as structured resources such as `Patient`, `Observation`, and `Questionnaire`. This toolkit generates PHP model classes from FHIR Structure Definitions, serializes resources to and from JSON and XML, validates resources against the specification and Implementation Guides, and evaluates FHIRPath 2.0 expressions. It also generates and serializes CDA R2 logical models, including the AU Digital Health extensions.

{% hint style="info" %}
The packages can be used independently or together. If you only need serialization, install `ardenexal/fhir-serialization`; if you are building a Symfony application, `ardenexal/fhir-bundle` wires everything for you.
{% endhint %}

## What's in the toolkit

<table data-view="cards"><thead><tr><th>Capability</th><th>Package</th><th data-card-target data-type="content-ref">Docs</th></tr></thead><tbody><tr><td>Generate PHP models from FHIR definitions</td><td><code>ardenexal/fhir-code-generation</code></td><td><a href="/code-generation/overview.md">Overview</a></td></tr><tr><td>JSON / XML serialization</td><td><code>ardenexal/fhir-serialization</code></td><td><a href="/serialization/overview.md">Overview</a></td></tr><tr><td>Resource &#x26; profile validation</td><td><code>ardenexal/fhir-validation</code></td><td><a href="/validation/overview.md">Overview &amp; Architecture</a></td></tr><tr><td>FHIRPath expression evaluation</td><td><code>ardenexal/fhir-path</code></td><td><a href="/fhirpath/overview.md">Overview &amp; Quick Start</a></td></tr><tr><td>CDA R2 &#x26; AU CDA logical models</td><td><code>ardenexal/cda-sd-models</code></td><td><a href="/code-generation/cda.md">Generating CDA Logical Models</a></td></tr><tr><td>Symfony integration</td><td><code>ardenexal/fhir-bundle</code></td><td><a href="/symfony-bundle/configuration.md">Install and Configure the Bundle</a></td></tr></tbody></table>

## Where to start

* New to the library? Start with [Installation](/getting-started/installation.md) and the [Quick Start](/getting-started/quick-start.md).
* Not sure which package you need? See [Choosing the Right Package](/getting-started/packages.md).


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