Combining XML files in php - php

Question

I am getting external xml files (through file exchange) and I am able to read and store in the database (php/mysql).
The xml files come zipped under different names and sometimes several files come together zipped in a folder
When the folder has only 1 xml file,I am able to successfully unzip and read the content using
$path = '/xmlFile';
//the xmlFile names are in this format : xmFile-00001235.xml,
//xmlFile-000012390.xml, etc. only first portions are consistent
foreach (glob($path.'/xmlFile-*.xml') as $filename)
{
$xml=file_get_contents($filename);
}
//store in database and unlink the xml file
This only works if the folder has one xml file, because I am un-linking the xml file after storage, it un-links all the files but only stores one
What would be the best approach; I am thinking of checking if the folder has more than 1 xml and combine the xml files? maybe a sample solution will really help,
The sample xml is as follows
xml1.xml
<sales>
<row id="000001" saleid="267158" amountSold="2000" />
<row id="000001" saleid="267159" amountSold="80.000" />
</sales>
xml2.xml
<sales>
<row id="000001" saleid="267160" amountSold="4000" />
<row id="000001" saleid="267161" amountSold="580" />
</sales>

Answer 1

Merging several files can be done something like...
function mergeFile ( DOMDocument $target, $fileName ) {
$source = new DOMDocument();
$source->load($fileName);
foreach ( $source->getElementsByTagName("row") as $row ) {
$import = $target->importNode($row, true);
$target->documentElement->appendChild($import);
}
}
$target = new DOMDocument();
$target->loadXML('<?xml version="1.0" encoding="utf-8"?><sales></sales>');
mergeFile($target, "NewFile.xml");
mergeFile($target, "NewFile1.xml");
mergeFile($target, "NewFile2.xml");
$target->save("out2.xml");
This allows you to keep on adding all of the files together and then saving them at the end.

Answer 2

Based on the answer in: Merge XML files in PHP
$doc1 = new DOMDocument();
$doc1->load('1.xml');
$doc2 = new DOMDocument();
$doc2->load('2.xml');
// get 'res' element of document 1
$res1 = $doc1->getElementsByTagName('items')->item(0); //edited res - items
// iterate over 'item' elements of document 2
$items2 = $doc2->getElementsByTagName('item');
for ($i = 0; $i < $items2->length; $i ++) {
$item2 = $items2->item($i);
// import/copy item from document 2 to document 1
$item1 = $doc1->importNode($item2, true);
// append imported item to document 1 'res' element
$res1->appendChild($item1);
}