英文:
PHP SimpleXML Xpath Relative to Current Node Only
问题
我正在尝试运行一个简单的PHP SimpleXML命令，使用xpath。但是，我的//w:pStyle XPath选择了整个文档中的所有节点，而不是相对于正在循环的//w:p节点。**注意：**我希望保持两个xpaths的循环分开。我不想将它们放在一个xpath下，即如果段落中存在样式节点，则首先循环段落节点，然后仅循环该段落中的样式节点。解决方法是什么？
英文:
I am trying to run a simple PHP SimpleXML command using xpath. But, my //w:pStyle Xpath is getting all nodes in the entire document and not the ones relative to the node //w:p thats being looped. Note: I want to keep the loop for both xpaths separate. I do not want to have both under one xpath i.e. loop through the paragraph nodes and then loop the styles nodes only in that paragraph if they exist.
foreach($file->xpath('//w:p') as $p){
echo 'Paragraph';
$styles=$p->xpath('//w:pStyle');
foreach($styles as $style){echo 'Style';}
}
The xpath //w:pStyle selects all the w:pStyle nodes. I would like instead for it to select the ones that are relative to the paragraph node. What is the solution here?
答案1
得分: 1
你的错误在于，在表达式前面加上 // 来选择整个文档中的元素。你应该使用 .// 替代，像这样：
$styles=$p->xpath('.//w:pStyle');
这样会选择 w:p 元素的所有 w:pStyle 后代。
如果你只想选择 w:p 的直接子元素，可以使用：
$styles=$p->xpath('w:pStyle');
因为 w:pStyle 是 w:pPr 的子元素，而 w:pPr 是 w:p 的子元素，所以你可以使用：
$styles=$p->xpath('w:pPr/w:pStyle');
英文:
Your mistake is, that you are selecting elements from the whole document by prefixing the expression with //. You should prefix it with .// instead, like this
$styles=$p->xpath('.//w:pStyle');
which will select all w:pStyle descendants of the w:p element.
If you only want direct children of w:p, use
$styles=$p->xpath('w:pStyle');
since w:pStyle is a child of w:pPr which is a child of w:p, you could use
$styles=$p->xpath('w:pPr/w:pStyle');
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