app.php

<?php

require_once __DIR__.'/silex.phar';

use Silex\Application;

$app = new Application();

$app->get('/hello', function() {
    return 'get hello';
});

$app->put('/hello', function() {
    return 'put hello';
});

return $app;

routes.php

<?php

$app = require __DIR__.'/app.php';

$routeCollection = $app->getRouteCollection();

foreach ($routeCollection->all() as $name => $route) {
    $requirements = $route->getRequirements();
    $method = isset($requirements['_method']) ? strtoupper(is_array($requirements['_method']) ? implode(', ', $requirements['_method']) : $requirements['_method']) : 'ANY';
    var_dump(array($method, $route->getPattern()));
}