php – magento价格getPrice()值

function getDescriptionHtml($tpl,$p){
    $out = "";
    $pr = $p["product"];

    if(Mage::getStoreConfig('featuredproducts/displayoptions/title') == 'description'){
        $out .= "<ins><h4>{$pr->getName()}</h4></ins>";
    }
    $out .= "<span class="description"".
            (!Mage::getStoreConfig('featuredproducts/displayoptions/description') ?
                    "style="display:none;""
                :
                    ""
            )
            .">{$p['description']}</span>";
    $out .= "<ins><div>".
            (Mage::getStoreConfig('featuredproducts/displayoptions/price') ?
                    "<span style="font-size:45px">{$pr->getPrice()}</span>"
                :
                    ""
            )       
            ."".
            (Mage::getStoreConfig('featuredproducts/displayoptions/bnb') ?
                    "<div><button style="postion:relative;margin-left:80px;margin-top:140px" class="form-button" onclick="setLocation('{$p["url"]}')"><span>{$tpl->__('Buy Now')}</span></button></div>"
                :
                    "")
            ."
            </div></ins>";
    return $out;        
}

根据显示的代码,当我使用$pr-> getPrice()时,其输出看起来像299.0000,但我希望它像299.00.我该怎么做？