Obtain parentnode with a xpath query on cakephp

So, i'm using Cakephp an开发者_如何学Cd I have a xml file that looks something like this:

<something>
<table id="t1">
  <columns>
    <column id="c1"/>
    <column id="c2"/>
  </columns>
</table>
<table id="t2">
  <columns>
......
</something>

I was using Set::extract to search for the column based on it's id, no problems with that one:

Set::extract("/something/table/columns/column[id=$column_id"]", $array);

Now i need to get the parent table of that column. I tried with Set and SimpleXMLElement, but to no avail.

Can someone help me? thanks

---

Use:

Set::extract("/something/table[columns/column[id=$column_id"]]", $array); 

The XPath expression:

/something/table[columns/column[id=$column_id"]]

selects all table elements that are children of the top element something and that have a columns/column grand-child element the string value of whose id child is equal to the string value of the variable $column_id.