README

How to install:

Via composer

composer require mohamed-amine/ioc-container

What can it do:

• create instances and resolve their dependencies automatically.
• resolve dependencies from types( like Interfaces) if they are registered.
• create instances from registred services locators.
• bind existing instances into the container (can be used for service providers).
• call instances from the container anywhere in your application.

How to use it:

Create the contianer:

in order to use all the features we need to create a container first

  IOC\IOC::createContainer();

Create an instance in the container:

• to create an instance and resolve it's dependencies automatically:

  IOC\IOC::container()->build('namespace\MyClass');

This will create the MyClass object and create all of it's dependencies recursively for example:

// instead of doing this
new MyClass(new ClassA(), new ClassB());
// you can just do this and it will create ClassA & ClassB and pass them automatically
IOC\IOC::container()->build('namespace\MyClass');

In order for this to work you need to use type hinting in MyClass constructor :

...
public function __constructor(ClassA $classa, ClassB $classb) {...}
...

• if the instance require arguments we should pass them in an array as a second argument of 'build()' (note that automatic dependencies resolving can't be used in this case):

  IOC\IOC::container()->build('namespace\MyClass', $argument1, $argument2);

Bind instances into the container:

To bind an existing instance into the container

  IOC\IOC::bind('MyClass',function() {
    return new namespace\MyClass();
  });

Now we will be able to access our instance anywhere in the application like this:

  IOC\IOC::container()->MyClass;
  // or 
  IOC\IOC::container()->get('MyClass');

Build instances from services locators (short names):

We can define service locators using the regiter method

  IOC\IOC::container()->register('MyClass', namespace\MyClass::class);

Then we can build an instance using this service locator

  IOC\IOC::container()->build('MyClass');

Registering Types:

Types are registered to help the container to resolve classes dependencies, for example if a class A have a dependency of Type SomeInterface which is an interface, we will have to register this type first in order to be able to resolve it:

  IOC\IOC::container()->registerType('SomeInterface', Namespace\SomeClass::class);

Calling instances from the container:

we can call instances from the container using 2 methods

  IOC\IOC::container()->MyInstance;
  // Or
  IOC\IOC::container()->get('MyInstance');