In the Factory Method Pattern, a factory method defines what functions must be available in the non-abstract or concrete factory. These functions must be able to create objects that are extensions of a specific class. Which exact subclass is created …

In the Builder Pattern a director and a builder work together to build an object. The director controls the building and specifies what parts and variations will go into an object. The builder knows how to assemble the object given …

An example of a design pattern An abstract factory in PHP

<?php
/*
 *  Abstract Factory classes
 */
 
abstract class DB_Abstraction_Factory {
    protected $settings = array();
    protected function __construct() {
        $this->settings = Settings::getInstance();
    }
 
    abstract public function createInstance();
}
 
class …