php如何获取豆瓣电影评分？

Question

<span class="branch">    {if:"{playpage:douban}"==""}    <span class="font-size-12">暂无评分 </span>         {elseif:{playpage:douban} == 0}    <span class="font-size-12">暂无评分 </span>    {else}{playpage:douban}    {end if} </span><script type="text/javascript">    var str = "{playpage:douban}%"     document.getElementById("score").style.width = (str.replace(".", ""))</script>以上代码，为什么获取不到豆瓣评分？哪个地方有问题，求解？！