SeparatorToCamelCase.php

<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Filter
 * @copyright  Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id$
 */

/**
 * @see Zend_Filter_PregReplace
 */
require_once 'Zend/Filter/Word/Separator/Abstract.php';

/**
 * @category   Zend
 * @package    Zend_Filter
 * @copyright  Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Filter_Word_SeparatorToCamelCase extends Zend_Filter_Word_Separator_Abstract
{

    public function filter($value)
    {
        // a unicode safe way of converting characters to \x00\x00 notation
        $pregQuotedSeparator = preg_quote($this->_separator, '#');

        if (self::isUnicodeSupportEnabled()) {
            $patterns = array(
                '#(' . $pregQuotedSeparator.')(\p{L}{1})#u',
                '#(^\p{Ll}{1})#u',
            );
            if ( ! extension_loaded('mbstring') ) {
                $replacements = array(
                    function ($matches) {
                        return strtoupper($matches[2]);
                    },
                    function ($matches) {
                        return strtoupper($matches[1]);
                    },
                );
            } else {
                $replacements = array(
                    function ($matches) {
                        return mb_strtoupper($matches[2], 'UTF-8');
                    },
                    function ($matches) {
                        return mb_strtoupper($matches[1], 'UTF-8');
                    },
                );
            }
        } else {
            $patterns = array(
                '#(' . $pregQuotedSeparator.')([A-Za-z]{1})#',
                '#(^[A-Za-z]{1})#',
            );
            $replacements = array(
                function ($matches) {
                    return strtoupper($matches[2]);
                },
                function ($matches) {
                    return strtoupper($matches[1]);
                },
            );

        }

        $filtered = $value;
        foreach ($patterns as $index => $pattern) {
            $filtered = preg_replace_callback($pattern, $replacements[$index], $filtered);
        }

        return $filtered;
    }

}