for loop putting two similar entries in one loop in php - php

Question

I wrote a code according to which I can write one XML file into number of XML files depending on number of records.
I have 14 records in one XML file having different tags in XML file.
I am trying to create XML files having having 2 records each, so in the end I should be having 7 XML files.
But instead that I'm getting 14 files only, each file having two similar records.
Following is my XML format, which is getting created dynamically. Format is coming correctly. But two similar entries are coming in each file. So instead of 7 its writing 14 files.
<?xml version="1.0"?>
<data>
<Product>
<PID>SGLDN7XJ2FPZH8G8</PID>
<PNAME>Miami Blues Aviator Sunglasses</PNAME>
</Product>
</data>
Following is my file which is making XML files. I think something is wrong in initializing the for loop:
$docOutput = new DOMDocument("1.0");
$root = $docOutput->createElement("data");
$docOutput->appendChild($root);
if (!$sxmlReading = simplexml_load_file('firstxml.xml')) {
throw new RuntimeException('Error reading XML file');
}
$x = 0;
foreach ($sxmlReading as $syn) {
for ($i = $x * 2; $i < ($x + 1) * 2; $i++) {
$id = $docOutput->createElement("PID");
$idText = $docOutput->createTextNode($syn->productId);
$id->appendChild($idText);
$title = $docOutput->createElement("PNAME");
$titleText = $docOutput->createTextNode($syn->productname);
$title->appendChild($titleText);
$book = $docOutput->createElement("Product");
$book->appendChild($id);
$book->appendChild($title);
$root->appendChild($book);
$docOutput->formatOutput = true;
echo "<xmp>" . $docOutput->saveXML() . "</xmp>";
$docOutput->save("xml$x.xml") or die("Error");
}
$x++;
}
Please check the code and highlight my mistake...

Answer 1

It is writing 14 files because you are calling the DOMDocument::save() method 14 times.
Sounds more like a typo to me honestly, I can not see anything wrong with that. PHP just does as you've written it to do.