SonataAdminBundle/Translator/UnderscoreLabelTranslatorStrategy.php

<?php

/*
 * This file is part of sonata-project.
 *
 * (c) 2010 Thomas Rabaix
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Sonata\AdminBundle\Translator;

class UnderscoreLabelTranslatorStrategy implements LabelTranslatorStrategyInterface
{
    /**
     * {@inheritDoc}
     */
    public function getLabel($label, $context = '', $type = '')
    {
        $label = str_replace('.', '_', $label);

        return sprintf('%s.%s_%s', $context, $type, strtolower(preg_replace('~(?<=\\w)([A-Z])~', '_$1', $label)));
    }
}