# league/config

[![Latest Version](https://img.shields.io/packagist/v/league/config.svg?style=flat-square)](https://packagist.org/packages/league/config)
[![Total Downloads](https://img.shields.io/packagist/dt/league/config.svg?style=flat-square)](https://packagist.org/packages/league/config)
[![Software License](https://img.shields.io/badge/License-BSD--3-brightgreen.svg?style=flat-square)](LICENSE)
[![Build Status](https://img.shields.io/github/workflow/status/thephpleague/config/Tests/main.svg?style=flat-square)](https://github.com/thephpleague/config/actions?query=workflow%3ATests+branch%3Amain)
[![Coverage Status](https://img.shields.io/scrutinizer/coverage/g/thephpleague/config.svg?style=flat-square)](https://scrutinizer-ci.com/g/thephpleague/config/code-structure)
[![Quality Score](https://img.shields.io/scrutinizer/g/thephpleague/config.svg?style=flat-square)](https://scrutinizer-ci.com/g/thephpleague/config)
[![Sponsor development of this project](https://img.shields.io/badge/sponsor%20this%20package-%E2%9D%A4-ff69b4.svg?style=flat-square)](https://www.colinodell.com/sponsor)

**league/config** helps you define nested configuration arrays with strict schemas and access configuration values with dot notation.  It was created by [Colin O'Dell][@colinodell].

## 📦 Installation

This project requires PHP 7.4 or higher.  To install it via [Composer] simply run:

```bash
composer require league/config
```

## 🧰️ Basic Usage

The `Configuration` class provides everything you need to define the configuration structure and fetch values:

```php
use League\Config\Configuration;
use Nette\Schema\Expect;

// Define your configuration schema
$config = new Configuration([
    'database' => Expect::structure([
        'driver' => Expect::anyOf('mysql', 'postgresql', 'sqlite')->required(),
        'host' => Expect::string()->default('localhost'),
        'port' => Expect::int()->min(1)->max(65535),
        'ssl' => Expect::bool(),
        'database' => Expect::string()->required(),
        'username' => Expect::string()->required(),
        'password' => Expect::string()->nullable(),
    ]),
    'logging' => Expect::structure([
        'enabled' => Expect::bool()->default($_ENV['DEBUG'] == true),
        'file' => Expect::string()->deprecated("use logging.path instead"),
        'path' => Expect::string()->assert(function ($path) { return \is_writeable($path); })->required(),
    ]),
]);

// Set the values, either all at once with `merge()`:
$config->merge([
    'database' => [
        'driver' => 'mysql',
        'port' => 3306,
        'database' => 'mydb',
        'username' => 'user',
        'password' => 'secret',
    ],
]);

// Or one-at-a-time with `set()`:
$config->set('logging.path', '/var/log/myapp.log');

// You can now retrieve those values with `get()`.
// Validation and defaults will be applied for you automatically
$config->get('database');        // Fetches the entire "database" section as an array
$config->get('database.driver'); // Fetch a specific nested value with dot notation
$config->get('database/driver'); // Fetch a specific nested value with slash notation
$config->get('database.host');   // Returns the default value "localhost"
$config->get('logging.path');    // Guaranteed to be writeable thanks to the assertion in the schema

// If validation fails an `InvalidConfigurationException` will be thrown:
$config->set('database.driver', 'mongodb');
$config->get('database.driver'); // InvalidConfigurationException

// Attempting to fetch a non-existent key will result in an `InvalidConfigurationException`
$config->get('foo.bar');

// You could avoid this by checking whether that item exists:
$config->exists('foo.bar'); // Returns `false`
```

## 📓 Documentation

Full documentation can be found at [config.thephpleague.com][docs].

## 💭 Philosophy

This library aims to provide a **simple yet opinionated** approach to configuration with the following goals:

- The configuration should operate on **arrays with nested values** which are easily accessible
- The configuration structure should be **defined with strict schemas** defining the overall structure, allowed types, and allowed values
- Schemas should be defined using a **simple, fluent interface**
- You should be able to **add and combine schemas but never modify existing ones**
- Both the configuration values and the schema should be **defined and managed with PHP code**
- Schemas should be **immutable**; they should never change once they are set
- Configuration values should never define or influence the schemas

As a result, this library will likely **never** support features like:

- Loading and/or exporting configuration values or schemas using YAML, XML, or other files
- Parsing configuration values from a command line or other user interface
- Dynamically changing the schema, allowed values, or default values based on other configuration values

If you need that functionality you should check out other libraries like:

- [symfony/config]
- [symfony/options-resolver]
- [hassankhan/config]
- [consolidation/config]
- [laminas/laminas-config]

## 🏷️ Versioning

[SemVer](http://semver.org/) is followed closely. Minor and patch releases should not introduce breaking changes to the codebase.

Any classes or methods marked `@internal` are not intended for use outside this library and are subject to breaking changes at any time, so please avoid using them.

## 🛠️ Maintenance & Support

When a new **minor** version (e.g. `1.0` -> `1.1`) is released, the previous one (`1.0`) will continue to receive security and critical bug fixes for *at least* 3 months.

When a new **major** version is released (e.g. `1.1` -> `2.0`), the previous one (`1.1`) will receive critical bug fixes for *at least* 3 months and security updates for 6 months after that new release comes out.

(This policy may change in the future and exceptions may be made on a case-by-case basis.)

## 👷‍️ Contributing

Contributions to this library are **welcome**! We only ask that you adhere to our [contributor guidelines] and avoid making changes that conflict with our Philosophy above.

## 🧪 Testing

```bash
composer test
```

## 📄 License

**league/config** is licensed under the BSD-3 license.  See the [`LICENSE.md`][license] file for more details.

## 🗺️  Who Uses It?

This project is used by [league/commonmark][league-commonmark].

[docs]: https://config.thephpleague.com/
[@colinodell]: https://www.twitter.com/colinodell
[Composer]: https://getcomposer.org/
[PHP League]: https://thephpleague.com
[symfony/config]: https://symfony.com/doc/current/components/config.html
[symfony/options-resolver]: https://symfony.com/doc/current/components/options_resolver.html
[hassankhan/config]: https://github.com/hassankhan/config
[consolidation/config]: https://github.com/consolidation/config
[laminas/laminas-config]: https://docs.laminas.dev/laminas-config/
[contributor guidelines]: https://github.com/thephpleague/config/blob/main/.github/CONTRIBUTING.md
[license]: https://github.com/thephpleague/config/blob/main/LICENSE.md
[league-commonmark]: https://commonmark.thephpleague.com

.NET Framework

Project Request

ProjectC

Vehicle Maintenance

Movie Navigator

Customers Exchange

ATM

.NET Core

Mail Daemon

Custom

Buns of code

PHP

Mediabox

Loan Castle

Content Management

Laravel

Phone Check

Frontend

Forex Wall

Business projects

Certification Center

Amerikas Auto

Pet projects

Geolocation Assistant

Web Dynamics

Blackball

Good old times

DOS Clock

BrainOut

Airport Administrator

Atomizer

Mediabox