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# league/config [](https://packagist.org/packages/league/config) [](https://packagist.org/packages/league/config) [](LICENSE) [](https://github.com/thephpleague/config/actions?query=workflow%3ATests+branch%3Amain) [](https://scrutinizer-ci.com/g/thephpleague/config/code-structure) [](https://scrutinizer-ci.com/g/thephpleague/config) [](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