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# chillerlan/php-settings-container
A container class for immutable settings objects. Not a DI container. PHP 7.4+
- [`SettingsContainerInterface`](https://github.com/chillerlan/php-settings-container/blob/main/src/SettingsContainerInterface.php) provides immutable properties with magic getter & setter and some fancy - decouple configuration logic from your application!
[![PHP Version Support][php-badge]][php]
[![version][packagist-badge]][packagist]
[![license][license-badge]][license]
[![Coverage][coverage-badge]][coverage]
[![Scrunitizer][scrutinizer-badge]][scrutinizer]
[![Packagist downloads][downloads-badge]][downloads]
[![Continuous Integration][gh-action-badge]][gh-action]
[php-badge]: https://img.shields.io/packagist/php-v/chillerlan/php-settings-container?logo=php&color=8892BF
[php]: https://www.php.net/supported-versions.php
[packagist-badge]: https://img.shields.io/packagist/v/chillerlan/php-settings-container.svg?logo=packagist
[packagist]: https://packagist.org/packages/chillerlan/php-settings-container
[license-badge]: https://img.shields.io/github/license/chillerlan/php-settings-container.svg
[license]: https://github.com/chillerlan/php-settings-container/blob/main/LICENSE
[coverage-badge]: https://img.shields.io/codecov/c/github/chillerlan/php-settings-container.svg?logo=codecov
[coverage]: https://codecov.io/github/chillerlan/php-settings-container
[scrutinizer-badge]: https://img.shields.io/scrutinizer/g/chillerlan/php-settings-container.svg?logo=scrutinizer
[scrutinizer]: https://scrutinizer-ci.com/g/chillerlan/php-settings-container
[downloads-badge]: https://img.shields.io/packagist/dt/chillerlan/php-settings-container.svg?logo=packagist
[downloads]: https://packagist.org/packages/chillerlan/php-settings-container/stats
[gh-action-badge]: https://github.com/chillerlan/php-settings-container/workflows/CI/badge.svg
[gh-action]: https://github.com/chillerlan/php-settings-container/actions?query=workflow%3A%22CI%22
## Documentation
### Installation
**requires [composer](https://getcomposer.org)**
*composer.json* (note: replace `dev-main` with a [version constraint](https://getcomposer.org/doc/articles/versions.md#writing-version-constraints), e.g. `^2.1` - see [releases](https://github.com/chillerlan/php-settings-container/releases) for valid versions)
```json
{
"require": {
"php": "^7.4",
"chillerlan/php-settings-container": "dev-main"
}
}
```
Profit!
## Usage
The `SettingsContainerInterface` (wrapped in`SettingsContainerAbstract` ) provides plug-in functionality for immutable object properties and adds some fancy, like loading/saving JSON, arrays etc.
It takes an `iterable` as the only constructor argument and calls a method with the trait's name on invocation (`MyTrait::MyTrait()`) for each used trait.
### Simple usage
```php
class MyContainer extends SettingsContainerAbstract{
protected $foo;
protected $bar;
}
```
Typed properties in PHP 7.4+:
```php
class MyContainer extends SettingsContainerAbstract{
protected string $foo;
protected string $bar;
}
```
```php
// use it just like a \stdClass
$container = new MyContainer;
$container->foo = 'what';
$container->bar = 'foo';
// which is equivalent to
$container = new MyContainer(['bar' => 'foo', 'foo' => 'what']);
// ...or try
$container->fromJSON('{"foo": "what", "bar": "foo"}');
// fetch all properties as array
$container->toArray(); // -> ['foo' => 'what', 'bar' => 'foo']
// or JSON
$container->toJSON(); // -> {"foo": "what", "bar": "foo"}
// JSON via JsonSerializable
$json = json_encode($container); // -> {"foo": "what", "bar": "foo"}
//non-existing properties will be ignored:
$container->nope = 'what';
var_dump($container->nope); // -> null
```
### Advanced usage
```php
trait SomeOptions{
protected $foo;
protected $what;
// this method will be called in SettingsContainerAbstract::construct()
// after the properties have been set
protected function SomeOptions(){
// just some constructor stuff...
$this->foo = strtoupper($this->foo);
}
// this method will be called from __set() when property $what is set
protected function set_what(string $value){
$this->what = md5($value);
}
}
trait MoreOptions{
protected $bar = 'whatever'; // provide default values
}
```
```php
$commonOptions = [
// SomeOptions
'foo' => 'whatever',
// MoreOptions
'bar' => 'nothing',
];
// now plug the several library options together to a single object
$container = new class ($commonOptions) extends SettingsContainerAbstract{
use SomeOptions, MoreOptions;
};
var_dump($container->foo); // -> WHATEVER (constructor ran strtoupper on the value)
var_dump($container->bar); // -> nothing
$container->what = 'some value';
var_dump($container->what); // -> md5 hash of "some value"
```
### API
#### [`SettingsContainerAbstract`](https://github.com/chillerlan/php-settings-container/blob/main/src/SettingsContainerAbstract.php)
method | return | info
-------- | ---- | -----------
`__construct(iterable $properties = null)` | - | calls `construct()` internally after the properties have been set
(protected) `construct()` | void | calls a method with trait name as replacement constructor for each used trait
`__get(string $property)` | mixed | calls `$this->{'get_'.$property}()` if such a method exists
`__set(string $property, $value)` | void | calls `$this->{'set_'.$property}($value)` if such a method exists
`__isset(string $property)` | bool |
`__unset(string $property)` | void |
`__toString()` | string | a JSON string
`toArray()` | array |
`fromIterable(iterable $properties)` | `SettingsContainerInterface` |
`toJSON(int $jsonOptions = null)` | string | accepts [JSON options constants](http://php.net/manual/json.constants.php)
`fromJSON(string $json)` | `SettingsContainerInterface` |
`jsonSerialize()` | mixed | implements the [`JsonSerializable`](https://www.php.net/manual/en/jsonserializable.jsonserialize.php) interface
## Disclaimer
This might be either an utterly genius or completely stupid idea - you decide. However, i like it and it works.
Also, this is not a dependency injection container. Stop using DI containers FFS.
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