Windwalker Application

Windwalker application is a kernel as main entry of your system.

Installation via Composer

Add this to the require block in your composer.json.

{
    "require": {
        "windwalker/application": "~3.0"
    }
}

Create An Application

Create application and extends the doExecute() method to something.

use Windwalker\Application\AbstractApplication;
use Windwalker\IO\Input;
use Windwalker\Structure\Structure;

class MyApplication extends AbstractApplication
{
    protected function init()
    {
        // Do stuff.

        // Get config
        $this->get('foo'); // bar
    }

    public function doExecute()
    {
        try
        {
            // Some code here...
        }
        catch (\Exception $e)
        {
            Error::renderErrorPage();
        }

        return true;
    }
}

$app = new MyApplication(new Structure(array('foo' => 'bar')));

$app->execute();

Config is Structure object, see Windwalker Structure

WebApplication

AbstractWebApplication contains WebEnvironment and WenHttpServer object that help us handle HTTP request and output.

WebEnvironment

Use WebEnvironment to get information of browser or server.

$this->environment->browser->getBrowser(); // Get browser name

Use Platform to get server information.

$this->environment->platform->isUnix();

See: Environment Package

PSR7 Handler

dispatch() is a standard PSR7 handler so we can write our logic here, just return Response object and the WebHttpServer object which in Application will render it to client.

use Psr\Http\Message\ResponseInterface as Response;
use Psr\Http\Message\ServerRequestInterface as Request;
use Windwalker\Application\AbstractWebApplication;

class MyHttpKernel extends AbstractWebApplication
{
	public function dispatch(Request $request, Response $response, $next = null)
	{
		// Get request query
		$query = $request->getQueryParams();

		// Get Psr Uri
		$uri = $request->getUri();

		// Write body
		$response->getBody()->write('<h1>Hello World~~~!</h1>');

		return $response;
	}
}

$app = new MyHttpKernel;

$app->execute();

Result:

<h1>Hello World~~~!</h1>

Error Handler

Set error handler as final handler so we can use it in dispatch().

class MyHttpKernel extends AbstractWebApplication
{
	public function dispatch(Request $request, Response $response, $next = null)
	{
		try
		{
			throw new \Exception('Whoops~', 500);
		}
		catch (\Exception $e)
		{
			return $next($e, $request, $response);
		}

		return $response;
	}
}

$app = new MyHttpKernel;

$app->setFinalHandler(function (Exception $e, Request $request, Response $response)
{
    $response->getBody()->write(sprintf('<h1>Error %s. Message: %s</h1>', $e->getCode(), $e->getMessage()));
});

$app->execute();

Result:

<h1>Error 500. Message: Whoops~</h1>

See Windwalker Http Package

Cli Application

This is a example of a simple cli application.

// app.php

use Windwalker\Application\AbstractCliApplication;

class MyCliApp extends AbstractCliApplication
{
    public function doExecute()
    {
        // Get options (-h)
        $help = $this->io->get('h');

        if ($help)
        {
            $msg = <<<MSG
Help message: version 1.0
------------------------------------
myapp.php <command> [-options]

  foo    Description of this command.
  bar    Description of this command.
  help   Description of this command.
MSG;

            $this->io->out($msg);
            
            $this->close();
        }

        // Get arguments
        $arg = $this->getArgument(0);

        // Do some stuff...

        return 0; // Exit code 0 means success
    }
}

$app = new MyCliApp;

$app->execute();

Now we can access this app by PHP CLI:

php app.php arg1 arg2 -h --option --foo bar --n=a

See: Windwalker IO