Get shopping cart price rule magento

<?php
$rule = Mage::getModel(‘salesrule/rule’)->load(32);
$rule->setWebsiteIds(“1”);
$currentDate = date(‘Y-m-d’);
$startDate = $rule->getFromDate();
$endDate = $rule->getToDate();

if (($currentDate >= $startDate) && ($currentDate <= $endDate))
{
if($rule->getIsActive())
{
if ((int)$rule->getDiscountAmount() == 20)
{
echo ‘<span class=”sale-flag prozent20″>’.$this->__(‘sale’).'</span>’;
}
}
}
?>