Decorator

<?php


//The Decorator Pattern provides a flexible alternative to subclassing. Decorator allows you to modify
//objects dynamically, adding capabilities without causing an explosion of subclasses
interface SomeBaseInterface {


    public function doSomething();
}


class SomeBaseClass implements SomeBaseInterface {


    public function __construct() {
    }


    public function doSomething() {
        return $this->doSomethingPrivate() . '.....';
    }


    private function doSomethingPrivate() {
        return 'Test text from SomeBaseClass';
    }
}


class SomeBaseClassDecorator {
    protected $baseClass;


    public function __construct($base) {
        
        $this->baseClass = $base;
    }


    public function doSomething() {
        $this->baseClass->doSomething();
    }
}


class ExtendedSomeBaseClassDecorator extends SomeBaseClassDecorator {
    protected $moreText = 'More!!!';


    public function __construct($more, $someBaseInterfaceExtender) {
        $this->moreText = $more;
        parent::__construct($someBaseInterfaceExtender);
    }


    public function doSomething() {
        return $this->baseClass->doSomething() . $this->moreText;
    }
}


$decorator = new ExtendedSomeBaseClassDecorator(" decorator text", new SomeBaseClass() );


echo $decorator->doSomething();