Phinx usage in Symfony2 controller without CLI. Result at https://michalzuber.wordpress.com/2017/05/18/phinx-migrate-in-php-without-cli/

phinx-sf2-migrate.php

<?php

use Phinx\Console\PhinxApplication;
use Symfony\Component\Console\Input\ArrayInput;
use Symfony\Component\Console\Output\BufferedOutput;
use Symfony\Component\HttpFoundation\Response;

public function migrateDbAction()
{
    $kernel = $this->get('kernel');
    $phinx = new PhinxApplication();
    $phinx->setAutoExit(false);

    $input = new ArrayInput(array(
        'command' => 'migrate',
        '-c' => dirname($kernel->getRootDir()).'/phinx.yml',
        '-e' => $kernel->getEnvironment(),
    ));

    $output = new BufferedOutput();
    $phinx->run($input, $output);

    return new Response(nl2br($output->fetch()));
}