Silex + OptionsResolverでFizzBuzz

built-in-server.php

<?php
$path = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH);

if (file_exists(realpath(__DIR__ . $path))) {
    return false;
}

require __DIR__ . DIRECTORY_SEPARATOR . 'index.php';

composer.json

{
    "require": {
        "silex/silex": "1.0.*",
        "symfony/options-resolver": "2.1.*"
    },
    "minimum-stability": "dev"
}

index.php

<?php
require_once realpath(__DIR__ .'/../vendor/autoload.php');

use Silex\Application;

use Symfony\Component\OptionsResolver\OptionsResolver;
use Symfony\Component\OptionsResolver\Options;

$app = new Application();

$app->get('/', function(Application $app) {

    $fizzBuzz = function($var) {
        return ($var % 3 * $var % 5) ? sprintf('%d', $var)
            : ($var % 3 ? '' : 'Fizz') . ($var % 5 ? '' : 'Buzz');
    };

    $resolver = new OptionsResolver();
    $resolver->setRequired(['number']);
    $resolver->setDefaults(['result' => function(Options $options) use ($fizzBuzz) {
        return $fizzBuzz($options['number']);
    }]);

    return sprintf('<pre>%s</pre>', print_r(array_map(function($var) use ($resolver) {
        return $resolver->resolve(['number' => $var])['result'];
    }, range(1, 100)), true));

});

$app->run();

index2.php

<?php
require_once realpath(__DIR__ .'/../vendor/autoload.php');

use Silex\Application;

use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;

use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;

use Symfony\Component\OptionsResolver\OptionsResolver;
use Symfony\Component\OptionsResolver\Options;

$app = new Application();

$app['debug'] = true;

$app['fizzBuzz'] = $app->protect(function($from, $to) use ($app) {
    if (!is_int($from) && !ctype_digit($from)) {
        throw new \InvalidArgumentException(
            sprintf('From パラメータ "%s" が数値ではありません', (string)$from));
    }
    if (!is_int($to) && !ctype_digit($to)) {
        throw new \InvalidArgumentException(
            sprintf('To パラメータが "%s" が数値ではありません', (string)$to));
    }
    if ($from > $to) {
        throw new \InvalidArgumentException(
            sprintf('To パラメータは From パラメータよりも大きい値をセットしてください From:%s To:%s', (string)$from, (string)$to));
    }
    $fizzBuzz = function($var) {
        return ($var % 3 * $var % 5) ? sprintf('%d', $var)
            : ($var % 3 ? '' : 'Fizz') . ($var % 5 ? '' : 'Buzz');
    };
    $resolver = new OptionsResolver();
    $resolver->setRequired(['number']);
    $resolver->setDefaults(['result' => function(Options $options) use ($fizzBuzz) {
        return $fizzBuzz($options['number']);
    }]);
    return array_map(function($var) use ($resolver) {
        return $resolver->resolve(['number' => $var])['result'];
    }, range(intval($from), intval($to)));
});

$app->get('/{var}/{type}', function(Application $app, Request $request, $var, $type) {
    $fizzBuzz = $app['fizzBuzz'];
    $vars = explode('-', $var);
    try {
        $results = $fizzBuzz($vars[0], isset($vars[1]) ? $vars[1] : $vars[0]);
    } catch (\InvalidArgumentException $e) {
        if ($type == 'json') {
             return $app->json($e->getMessage(), 400);
        }
        throw new BadRequestHttpException($e->getMessage());
    }
    return ($type == 'json')
        ? $app->json($results)
        : new Response(sprintf('<pre>%s</pre>', print_r($results, true)));
})
->value('var', '1-100')
->value('type', 'html');

$app->run();