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league/config

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.

📦 Installation

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

composer require league/config

🧰️ Basic Usage

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

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.

💭 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:

🏷️ Versioning

SemVer 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

composer test

📄 License

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

🗺️ Who Uses It?

This project is used by league/commonmark.

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