Source of file CamelcaseToUnderscore.php

<?php

/**

 * camelcase to underscore filter

 *

 * @category    PHP

 * @package     MvcLite

 * @subpackage  Filter

 * @since       File available since release 1.1.x

 * @author      Cory Collier <corycollier@corycollier.com>

 */

namespace MvcLite\Filter;

use MvcLite\FilterAbstract as FilterAbstract;

/**

 * camelcase to underscore filter

 *

 * @category    PHP

 * @package     MvcLite

 * @subpackage  Filter

 * @since       Class available since release 1.1.x

 * @author      Cory Collier <corycollier@corycollier.com>

 */

class CamelcaseToUnderscore extends FilterAbstract

{

    /**

     * (non-PHPdoc)

     * @see \MvcLite\FilterAbstract::filter()

     */

    public function filter($word = '')

    {

        $result = '';

        for ($i = 0; $i < strlen($word); $i++) {

            if ($i > 0 && strtolower($word{$i}) !== $word{$i}) {

                $result .= '_';

            }

            $result .= strtolower($word{$i});

        }

        return $result;

    }

}