Most efficient method of parsing non-standard XML document in PHP - php

Question

In PHP, what is the quickest, most efficient way to parse an XML document formatted like so:
<data>
<rowdata>
<fieldname>products_id</fieldname>
<value><![CDATA[1]]></value>
<fieldname>products_image</fieldname>
<value><![CDATA[image_one.jpg]]></value>
<fieldname>products_name</fieldname>
<value>Product One</value>
</rowdata>
<rowdata>
<fieldname>products_id</fieldname>
<value><![CDATA[2]]></value>
<fieldname>products_image</fieldname>
<value><![CDATA[image_two.jpg]]></value>
<fieldname>products_name</fieldname>
<value>Product Two</value>
</rowdata>
</data>
This is the format I've been given by a till system company to import products in to a database. I have no idea why they decided to have <fieldname> and <value> tags instead of just <products_id>1</products_id>
At the moment the only way I can think of doing is writing up some crude loop which sets a boolean each time a <value> tag is found and resets

Answer 1

Seems pretty straightforward. There is some logic - for each <fieldname> there is a <value> - I assume that each fieldname correspond to a column in a table.
Using simplexml :
$xml='<data>
<rowdata>
<fieldname>products_id</fieldname>
<value><![CDATA[1]]></value>
<fieldname>products_image</fieldname>
<value><![CDATA[image_one.jpg]]></value>
<fieldname>products_name</fieldname>
<value>Product One</value>
</rowdata>
<rowdata>
<fieldname>products_id</fieldname>
<value><![CDATA[2]]></value>
<fieldname>products_image</fieldname>
<value><![CDATA[image_two.jpg]]></value>
<fieldname>products_name</fieldname>
<value>Product Two</value>
</rowdata>
</data>';
$data = simplexml_load_string($xml);
$baseSQL='INSERT into TABLE set ';
foreach($data as $rowdata) {
$SQL='';
$count=0;
foreach ($rowdata->fieldname as $fieldname) {
if ($SQL!='') $SQL.=',';
$SQL.=$fieldname.'="'.$rowdata->value[$count].'"';
$count++;
}
echo $baseSQL.$SQL.'<br>';
}
produces :
INSERT into TABLE set products_id="1",products_image="image_one.jpg",products_name="Product One"
INSERT into TABLE set products_id="2",products_image="image_two.jpg",products_name="Product Two"