Large XML for multiple files

[evgeniyefimchenko]

Hello! Using the read-write-simplexml.php example
I need to split a very large file into several small ones, with a certain number of .
And no matter what I do, subsequent files are obtained with a broken structure. Here is an example code:
$iterationGet = $_GET['iterationGet'] ? $_GET['iterationGet'] : 1;
$itemsCount = 0;
$itemCount = 0;
$countIteration = 5000; // count <offer>
$xmlInputFile = 'my.xml';
$xmlOutputFile = 'newXml_' . $iterationGet . '.xml';
$reader = new XMLReader();
$reader->open($xmlInputFile);
$writer = new XMLWriter();
$writer->openUri($xmlOutputFile);
$iterator = new XMLWritingIteration($writer, $reader);
$writer->startDocument();
foreach ($iterator as $node) {
$isElement = $node->nodeType === XMLReader::ELEMENT;
if ($isElement && strtolower($node->name) === 'offers') {
$itemsCount++;
$itemCount = 0;
}
if ($isElement && strtolower($node->name) === 'offer') {
$itemCount++;
if ($itemCount == $iterationGet) {
$iterationGet++;
if ($iterationGet % $countIteration == 0) {
header('Refresh:2; url=index.php?iterationGet=' . $iterationGet);
break;
}
$writer->startElement($node->name);
$writer->writeAttribute('id', $itemsCount . "-" . $itemCount);
if ($node->isEmptyElement) {
$writer->endElement();
}
}
} else {
$iterator->write();
}
}
$writer->endDocument();

I would be grateful if you tell me how to implement this.
Thank you!