CamelCaseToSeparator.php

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<?php
#require_once 'Zend/Filter/Word/Separator/Abstract.php';

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);
    }

}