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README.md

chillerlan/php-settings-container

A container class for immutable settings objects. Not a DI container. PHP 7.2+

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Documentation

Installation

requires composer

composer.json (note: replace dev-master with a version boundary)

{
	"require": {
		"php": "^7.2",
		"chillerlan/php-settings-container": "^1.0"
	}
}

Manual installation

Download the desired version of the package from master or release and extract the contents to your project folder. After that:

  • run composer install to install the required dependencies and generate /vendor/autoload.php.
  • if you use a custom autoloader, point the namespace chillerlan\Settings to the folder src of the package

Profit!

Usage

The SettingsContainerInterface (wrapped inSettingsContainerAbstract ) provides plug-in functionality for immutable object variables and adds some fancy, like loading/saving JSON, arrays etc. It takes 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

class MyContainer extends SettingsContainerAbstract{
	protected $foo;
	protected $bar;
}
// 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"}

//non-existing properties will be ignored:
$container->nope = 'what';

var_dump($container->nope); // -> null

Advanced usage

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
}
$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

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
fromJSON(string $json) SettingsContainerInterface
jsonSerialize() mixed implements the JsonSerializable 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.