xml parse xpath php

Question

I am having an xml document of this form:

   <root>
    <item title="x">
     <children/>
    </item>
    <item title="y">
      <children>
      <item title="y1">
      <children/>
      </item>
      <item title="y1">
      <children>
      <item title="y1.1">
      <children/>
      </item>
      </children>
      </item>
      </children>
     </item>
    </root>

and so on. Normally I would parse recursively the file for every node and see if the node has children or not to do some extra html formatting. The problem with this schema is that the children appear even if it is single entry (header of a single chapter for example) or empty.

I am using php and xpath, how can I know that the item/children/ of each node has no children so that I would apply a special formatting?

Dimitre Novatchev · Accepted Answer · 2012-09-13 15:26:05Z

1

how can I know that the item/children/ of each node has no children so that I would apply a special formatting?

This XPath expression:

//item/children[not(node())]

selects any children element in the XML document, that is a child of an item and that has no children nodes itself.

To select //item/children elements that do have children nodes themselves, use:

//item/children[node()]

answered Sep 13, 2012 at 15:26

Dimitre Novatchev

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Comments

Vincent Biragnet · Accepted Answer · 2012-09-13 15:25:31Z

0

XPath expression children[count(node())>0] return, in a given context, the children element(s) that is(are) not empty.

To have the one(s) that is(are) empty, change the > to =.

answered Sep 13, 2012 at 15:25

Vincent Biragnet

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1 Comment

Dimitre Novatchev Over a year ago

The use of count() is unnecessary in this case, and may result in inefficiency.

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