Download the PHP package openapi/openapi-sdk without Composer

Overview

A minimal and agnostic PHP SDK for Openapi, inspired by a clean client implementation. This SDK provides only the core HTTP primitives needed to interact with any Openapi service.

Pre-requisites

Before using the Openapi PHP Client, you will need an account at Openapi and an API key to the sandbox and/or production environment

Features

• Agnostic Design: No API-specific classes, works with any Openapi service
• Minimal Dependencies: Only requires PHP 8.0+ and cURL
• OAuth Support: Built-in OAuth client for token management
• HTTP Primitives: GET, POST, PUT, DELETE, PATCH methods
• Clean Interface: Similar to the Rust SDK design
• Static Analysis: PHPStan level 6 configuration available via Composer

What you can do

With the Openapi PHP Client, you can easily interact with a variety of services in the Openapi Marketplace. For example, you can:

• 📩 Send SMS messages with delivery reports and custom sender IDs
• 💸 Process bills and payments in real time via API
• 🧾 Send electronic invoices securely to the Italian Revenue Agency
• 📄 Generate PDFs from HTML content, including JavaScript rendering
• ✉️ Manage certified emails and legal communications via Italian Legalmail

For a complete list of all available services, check out the Openapi Marketplace 🌐

Installation

You can add the Openapi PHP Client to your project with the following command:

Quick Start

Token Generation

Making API Calls

Architecture

This SDK follows a minimal approach with only essential components:

• OauthClient: Handles OAuth authentication and token management
• Client: Agnostic HTTP client for API calls
• Exception: Error handling
• Cache\CacheInterface: Optional caching interface

Requirements

• PHP 8.0 or higher
• cURL extension
• JSON extension

Examples

You can find complete examples in the examples/ directory:

• examples/token_generation.php - OAuth token generation example
• examples/api_calls.php - HTTP API calls example
• examples/complete_workflow.php - End-to-end workflow example

Run examples with:

Testing

Run tests with:

Static Analysis

This SDK includes PHPStan as a Composer development dependency to help keep the codebase type-safe and maintainable.

PHPStan is configured in phpstan.neon and currently runs at level 6.

Run static analysis with:

Contributing

Contributions are always welcome! Whether you want to report bugs, suggest new features, improve documentation, or contribute code, your help is appreciated.

See docs/code-of-conduct.md to help maintain a welcoming and collaborative environment.

Authors

Meet the project authors:

• L. Paderi (@lpaderiAltravia)
• Openapi Team (@openapi-it)

Partners

Meet our partners using Openapi or contributing to this SDK:

• Blank
• Credit Safe
• Deliveroo
• Gruppo MOL
• Jakala
• Octotelematics
• OTOQI
• PWC
• QOMODO S.R.L.
• SOUNDREEF S.P.A.

Our Commitments

We believe in open source and we act on that belief. We became Silver Members of the Linux Foundation because we wanted to formally support the ecosystem we build on every day. Open standards, open collaboration, and open governance are part of how we work and how we think about software.

License

This project is licensed under the MIT License.

The MIT License is a permissive open-source license that allows you to freely use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the software, provided that the original copyright notice and this permission notice are included in all copies or substantial portions of the software.

In short, you are free to use this SDK in your personal, academic, or commercial projects, with minimal restrictions. The project is provided "as-is", without any warranty of any kind, either expressed or implied, including but not limited to the warranties of merchantability, fitness for a particular purpose, and non-infringement.

For more details, see the full license text at the MIT License page.