patrickkerrigan/php-di

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# pkerrigan/di
A simple, lightweight PHP 7.1 dependency injector.

## Why?
This was for fun, and doesn't really compare to the features offered by the popular dependency injectors. If you just need to inject objects then you may find this useful.

## Usage

```php
$injector = Injector::getInstance();
 
$injector->addClassResolver(new ArrayMapClassResolver([
    Interface::class => ConcreteImplementation::class
]));
 
$instance = $injector->get(Interface::class);
```

By default, all objects are treated as singletons (that is, the same object will be returned for successive calls to ```get()```). If you wish an object to be constructed again for every call of get (or injection) then you can explicitly define it as a ```Prototype``` like so:

```php
$injector->addClassResolver(new ArrayMapClassResolver([
    Interface::class => new Prototype(ConcreteImplementation::class)
]));
```