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Example code of opa/opa-php

Informations about the package opa-php

opa-php

A minimal PHP library for generating, reading, signing, and verifying Open Prompt Archive (OPA) files.

OPA is a portable, ZIP-based archive format for packaging AI agent prompts together with session history, data assets, and execution metadata.

Requirements

Installation

Quick Start

Creating an archive

Reading an archive

Signing and verification

API Reference

OpaArchive (builder)

OpaReader

Manifest

SessionHistory & Message

Signing

Verification

The verifier checks the full signature chain:

  1. Digital signature on SIGNATURE.SF
  2. Manifest digest matches actual MANIFEST.MF
  3. Per-entry section digests in SF match manifest sections
  4. File content digests in manifest match actual archive contents

Archive Structure

Examples

See examples/generate-hn-pirate-summary.php — fetches the Hacker News RSS feed, bundles it into a signed OPA archive with a prompt asking an AI to summarize articles in pirate speak and output styled HTML.

Testing

Specification

This library implements the OPA specification.

License

MIT

All versions of opa-php with dependencies

PHP Build Version
Package Version
Requires php Version >=8.1
ext-zip Version *
ext-json Version *
ext-openssl Version *
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