validpattern.php

<?php

use Symfony\Component\Routing\RouteCollection;
use Symfony\Component\Routing\Route;

$collection = new RouteCollection();
$collection->add('blog_show', new Route(
    '/blog/{slug}',
    array('_controller' => 'MyBlogBundle:Blog:show'),
    array('locale' => '\w+'),
    array('compiler_class' => 'RouteCompiler'),
    '{locale}.example.com',
    array('https'),
    array('GET', 'POST', 'put', 'OpTiOnS'),
    'context.getMethod() == "GET"'
));

return $collection;