setMatchPattern example

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()) {
            parent::setMatchPattern(array('#('.$pregQuotedSeparator.')(\p{L}{1})#e','#(^\p{Ll}{1})#e'));
            parent::setReplacement(array("strtoupper('\\2')","strtoupper('\\1')"));
        } else {
            parent::setMatchPattern(array('#('.$pregQuotedSeparator.')([A-Za-z]{1})#e','#(^[A-Za-z]{1})#e'));
            parent::setReplacement(array("strtoupper('\\2')","strtoupper('\\1')"));
        }

        return parent::filter($value);
    }

}

$temp['match'] = array_shift($options);
            }

            if (!empty($options)) {
                $temp['replace'] = array_shift($options);
            }

            $options = $temp;
        }

        if (array_key_exists('match', $options)) {
            $this->setMatchPattern($options['match']);
        }

        if (array_key_exists('replace', $options)) {
            $this->setReplacement($options['replace']);
        }
    }

    /** * Set the match pattern for the regex being called within filter() * * @param mixed $match - same as the first argument of preg_replace * @return Zend_Filter_PregReplace */

/** * @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_DashToSeparator extends Zend_Filter_Word_Separator_Abstract
{

    public function filter($value)
    {
        $this->setMatchPattern('#-#');
        $this->setReplacement($this->_separator);
        return parent::filter($value);
    }
}

class Zend_Filter_Word_CamelCaseToSeparator extends Zend_Filter_Word_Separator_Abstract
{

    public function filter($value)
    {
        if (self::isUnicodeSupportEnabled()) {
            parent::setMatchPattern(array('#(?<=(?:\p{Lu}))(\p{Lu}\p{Ll})#','#(?<=(?:\p{Ll}|\p{Nd}))(\p{Lu})#'));
            parent::setReplacement(array($this->_separator . '\1', $this->_separator . '\1'));
        } else {
            parent::setMatchPattern(array('#(?<=(?:[A-Z]))([A-Z]+)([A-Z][A-z])#', '#(?<=(?:[a-z0-9]))([A-Z])#'));
            parent::setReplacement(array('\1' . $this->_separator . '\2', $this->_separator . '\1'));
        }

        return parent::filter($value);
    }

}

    protected function _separatorToSeparatorFilter($value)
    {
        if ($this->_searchSeparator == null) {
            throw new Zend_Filter_Exception('You must provide a search separator for this filter to work.');
        }

        $this->setMatchPattern('#' . preg_quote($this->_searchSeparator, '#') . '#');
        $this->setReplacement($this->_replacementSeparator);
        return parent::filter($value);
    }

}