pages

Table of content

• Abstract Factory

• Adapter

• Bridge

• Builder

• Chain of responsibility

• Command

• Composite

• Decorator

• Facade

• Factory method

• Flyweight

• Interpreter

• Iterator

• Mediator

• Memento

• Model–view–controller

• Observer

• Prototype

• Proxy

• Singleton

• State

• Strategy

• Template method

• Visitor

class CPU
{
    public function freeze() { /* ... */ }
    public function jump( $position ) { /* ... */ }
    public function execute() { /* ... */ }

}

class Memory
{
    public function load( $position, $data ) { /* ... */ }
}

class HardDrive
{
    public function read( $lba, $size ) { /* ... */ }
}

/* Facade */
class Computer
{
    protected $cpu = null;
    protected $memory = null;
    protected $hardDrive = null;

    public function __construct()
    {
        $this->cpu = new CPU();
        $this->memory = new Memory();
        $this->hardDrive = new HardDrive();
    }

    public function startComputer()
    {
        $this->cpu->freeze();
        $this->memory->load( BOOT_ADDRESS, $this->hardDrive->read( BOOT_SECTOR, SECTOR_SIZE ) );
        $this->cpu->jump( BOOT_ADDRESS );
        $this->cpu->execute();
    }
}

/* Client */
$facade = new Computer();
$facade->startComputer();