README

A PHP specification system for generating OpenAPI 3.1-compatible schemas from PHP classes, enhanced with extra features and macros.

Compatible with: OpenAPI 3.1 Specification

Highlights

• Seamlessly integrates with PHP attributes and validators
• Supports schema generation from constructors or properties
• Allows macro extensions for enums and custom types

Installation

composer require ap-lib/openapi-plus

Requirements

• PHP 8.3 or higher

Getting Started

1. Initialize the OpenAPIPlus Loader

Create a loader class to configure the system with your custom object definitions and enums:

class OpenAPI
{
    private static OpenAPIPlus $openAPIPlus;

    public static function get(): OpenAPIPlus
    {
        return self::$openAPIPlus ??= new OpenAPIPlus([
            new ImplementedObject(),
        ]);
    }
}

2. Use Traits to Generate Schemas

Choose between generating schemas from constructor arguments or class properties.

Constructor-Based Schema

trait ByConstructorOpenAPI
{
    public static function openAPI(): array
    {
        return OpenAPI::get()->scheme(
            (new \ReflectionClass(static::class))
                ->getConstructor()
                ->getParameters()
        );
    }
}

Property-Based Schema

trait PropertiesOpenAPI
{
    public static function openAPI(): array
    {
        return OpenAPI::get()->scheme(
            (new \ReflectionClass(static::class))
                ->getProperties()
        );
    }
}

3. Annotate and Generate

Apply the trait to your class and use attribute-based validators (e.g. from ap-lib/validator):

Example how to implement OpenAPIModificator: https://github.com/ap-lib/validator/blob/main/src/String/Email.php

class SignUpBody
{
    use PropertiesOpenAPI;

    #[LabelCompany]
    public string $company_name;

    #[Email]
    public string $email;

    #[Password(min_length: 8)]
    public string $password;

    #[Timezone]
    public ?string $timezone = null;
}

Generate the OpenAPI schema:

echo json_encode(
    value: SignUpBody::openAPI(),
    flags: JSON_PRETTY_PRINT
);

Example Output

{
  "type": "object",
  "properties": {
    "company_name": {
      "type": "string",
      "minLength": 1,
      "maxLength": 32
    },
    "email": {
      "type": "string",
      "format": "email"
    },
    "password": {
      "type": "string",
      "format": "password"
    },
    "timezone": {
      "type": ["string", "null"],
      "default": null,
      "maxLength": 30
    }
  },
  "required": [
    "company_name",
    "email",
    "password"
  ]
}