php - 如何使用XPATH保持 ？

Question

我使用XPATH删除不整洁的HTML标签，

$nodeList = $xpath->query("//*[normalize-space(.)='' and not(self::br)]");
    foreach($nodeList as $node) 
    {
        $node->parentNode->removeChild($node);
    }

将会删除这些可怕的输入，

<p><em><br /></em></p>
<p><span style="text-decoration: underline;"><em><br /></em></span></p>

但它也消除了我想保持的 img tag打击，

<p><img title="picture summit" src="images/32913430_127001_e.jpg" alt="picture summit" width="590" height="366" /></p>

如何使用XPATH保留 img tag输入？

Answer 1

用：

//p[not(descendant::*[self::img or self::br]) and normalize-space()='']