Framework Example

framework-example.php

<?php

// handle a request, generate a response
interface RequestHandlerInterface
{
	public function setInputHandler(InputHandlerInterface $inputHandler);
	public function getInputHandler();

	public function setOutputHandler(OutputHandlerInterface $outputHandler);
	public function getOutputHandler();

	public function handleRequest();
}

interface InputHandlerInterface
{
	// not sure yet
}

interface OutputHanlderInterface
{
	// not sure yet

	public function preOutput();
	public function __toString();
}

class OurOwnRequestHandler implements RequestHandlerInterface
{
	private $inputHandler;
	
	public function setInputHandler($inputHandler)
	{
		$this->inputHandler = $inputHandler;
	}

	public function getInputHandler()
	{
		return $this->inputHandler;
	}
		
	public function setOutputHandler($outputHandler)
	{
		$this->outputHandler = $outputHandler;
	}
	
	public function getOutputHandler()
	{
		return $this->outputHandler;
	}
	
	public function handleRequest()
	{
		// routing way 1
		// framework structure way 1
	}
}

class OtherRequestHandler
{
	public function handleRequest()
	{
		// routing way 2
		// framework structure way 2
	}
}

class Framework
{
	private $handler;
	public function build(RequestHandlerInterface $handler)
	{
		$this->handler = $handler;
	}

	public function run()
	{
		$this->handler->handleRequest();

		$output = $this->handler->getOutputHandler();
		$output->preOutput(); // http would set headers for example, cli maybe nothing.

		return (string)$output;
	}
}

index.php
$handler = new OurOwnRequestHandler();
$handler->setInputHandler(HttpInputHandler::build());
$handler->setOuputHandler(HttpOutputHandler::build());

echo Framework::build($handler)->run();

-or-

cli.php
$handler = new OurOwnRequestHandler();
$handler->setInputHandler(CliInputHandler::build());
$handler->setOuputhandler(CliOutputHandler::build());

echo Framework::build($handler)->run();