zend验证器正则表达式

    $textarea = $this->createElement('text','scores');

    $textarea->setLabel('Enter a comma separated list of numbers');

    $textarea->setDecorators(
            array('ViewHelper',
                array('HtmlTag', 
                    array('tag' => 'div',
                          'class'=>'scores'
                    )
                )
            )
    );
    $textarea->addDecorator('Label')
        ->setRequired(true)
        ->addFilter(new Zend_Filter_StringTrim())
        ->addValidator('regex',true,array('^d{1,3}([,]d{1,3})*$'))
        ->addErrorMessage('Please enter a comma separated list of numbers');