Filtering XML attributes with xpath in PHP

Question

This is my XML file:

<?xml version="1.0" encoding="utf-8"?>
<sets>
  <set name="default">
    <phpClass name="ArrayIterator" />
  </set>
  <set name="production" basedOn="default">
    <phpVersion>
      <min>5.3.0</min>
    </phpVersion>
  </set>
</sets>

I have to get all items(set) and assign for example phpClass from default (or another) from XML, where sets are connected with basedOn. There is much more main sets (set with diffarent name) and a lot of sets with basedOn. This must be dynamically on more websites, I do not know all names and basedOn-s, so it will be dynamically script.

This is PHP what I have now (for testing):

$this->xml = simplexml_load_file($file);
print_r($this->xml->xpath("//sets/set[contains(name, 'default')]"));

But I get this: Array ( )

Any ideas? Maybe I am not much clear, so ask when you don't understand something.

Tobias Klevenz · Accepted Answer · 2014-03-23 11:58:44Z

3

you are trying to select a set that has a name element that contains 'default' you need to use @name to select the attribute instead:

$this->xml = simplexml_load_file($file);
print_r($this->xml->xpath("//sets/set[contains(@name, 'default')]"));

As a sidenote, there seems to be no need to use contains which is ususally used when you have something like a html class attribute where you have multiple classes, here you can just use set[@name='default'] instead.

edited Mar 23, 2014 at 11:58

answered Mar 23, 2014 at 11:37

Tobias Klevenz

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