Simple Container for PHP

Extremely basic and fast implementation of the PSR-11 container standard. It's not intended to do fancy dependency injection, just the absolute bare minimum. Consider using PHP-DI or Symfony DI for a more complete implementation.

Install

Via Composer

$ composer require netolabs/simple-container

Requirements

PHP version 7.3 and up is required.

Usage

Adding a definition to the container

$container = new SimpleContainer();
$service = new MySuperCoolService();

$container->set(MySuperCoolService::class, $service);

Fetching from the container

if ($container->has(MySuperCoolService::class) {
    $service = $container->get(MySuperCoolService::class);
}

Adding a callable definition

Here we are adding an anonymous function which will be invoked the first time the definition is accessed via set(). The computed value will be cached for subsequent accesses.

$container = new SimpleContainer();

$container->set('myCallable', function() {
    return 'a computed value';
});

$value = $container->get('myCallable');
// value is 'a computed value'

Invoking the callable for every access

If you require the callable to be invoked every time you access the definition, you can use the resolve() method instead.

$value = $container->resolve('myCallable');
// value is 'a computed value'

License

The MIT License (MIT). Please see the License File for more information.