正则匹配多个层级标签内容怎么写 [ 求助交流 ]

文件内容是从网页上面获取到的数据，想要通过正则匹配的方式获取各个标签里面的数据并筛选，然后存储到数据库里面。代码如下：

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<p class="productTitle">

<a href="//detail.tmall.com/item.htm?id=525182525801&amp;skuId=3125857498459&amp;areaId=330100&amp;cat_id=50032140&amp;rn=4bb8af42f516aa470ecbcd33067a6722&amp;user_id=693060164&amp;is_b=1" target="_blank" title="Heilan Home/海澜之家2016夏季新品男装圆领休闲印花短袖T恤" data-p="1-11" >
海澜之家夏季圆领休闲印花t恤
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海澜之家官方旗舰店
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     <span>月成交 <em>4.3万笔</em></span>
   <span>评价 <a href="//detail.tmall.com/item.htm?id=525182525801&amp;skuId=3125857498459&amp;areaId=330100&amp;cat_id=50032140&amp;rn=4bb8af42f516aa470ecbcd33067a6722&amp;user_id=693060164&amp;is_b=1&on_comment=1#J_TabBar" target="_blank" data-p="1-1">9946</a></span>
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