PHP XML find "searching" node and create new node after "searching node" - php

Question

i need some help from you :
loading XML from a file.
I'm also loading data from a CSV file.
I have 2 columns in CSv:
ID
Number
I'm looking for the ID from the CSV in the XML file.
I can find you, everything works.
However, I need to edit the XML as follows:
If you find an element in the XML whose ID is contains an ID value from a CSV file, copy this element as many times as the value is in the CSV (column number).
Here is my code.
<?php
$file = 'doc.xml';
if (!copy($file, $newfile)) {
echo "failed to copy";
}
$fh = fopen("data.csv", "r");
$csvData = array();
//Loop through the rows in our CSV file and add them to
//the PHP array that we created above.
while (($row = fgetcsv($fh, 0, ";")) !== FALSE) {
$csvData[] = $row;
}
$length = count($csvData);
if (file_exists('doc.xml')) {
$xml = simplexml_load_file('doc.xml');
for ($i=0; $i < $length; $i++) {
$searchedNode = $csvData[$i+1][0];
$searchingMedia = $xml->xpath("/node/media/image[contains(#id,'$searchedNode')]");
foreach ($searchingMedia as $node) {
$update = $node->addAttribute('count',$csvData[$i+1][1]);
}
}
}
$xml->asXml('doc_new.xml');
?>
CSV data :
Can someone help me please ?

Answer 1

SimplXML abstracts the XML nodes, so it is not the best API for direct node manipulations - use DOM.
You did not provide an example but from your code I would expect something like this:
$data = [
[
'42', '6'
]
];
$xml = <<<'XML'
<root>
<node>
<media>
<image id="42"/>
</media>
</node>
</root>
XML;
Then it is fairly straightforward:
// bootstrap the DOM
$document = new DOMDocument();
// let the parser ignore whitespace nodes (indents)
$document->preserveWhiteSpace = FALSE;
$document->loadXML($xml);
// DOM has a spearate object for Xpath
$xpath = new DOMXpath($document);
// iterate the CSV data
foreach ($data as $row) {
// looking for "image" elements with a specific id attribute
$expression = sprintf(
'//root/node/media/image[#id="%s"]',
$row[0]
);
// iterate the found image nodes
foreach ($xpath->evaluate($expression) as $imageNode) {
// "amount" times
for ($i = 0, $c = (int)$row[1]; $i < $c; $i++) {
// clone the "image" element and insert clone after it
$imageNode->after(
$newNode = $imageNode->cloneNode(TRUE)
);
// modify the clone
$newNode->textContent = 'Inserted Node #'.$i;
}
}
}
$document->formatOutput = TRUE;
echo $document->saveXML();
Output:
<?xml version="1.0"?>
<root>
<node>
<media>
<image id="42"/>
<image id="42">Inserted Node #5</image>
<image id="42">Inserted Node #4</image>
<image id="42">Inserted Node #3</image>
<image id="42">Inserted Node #2</image>
<image id="42">Inserted Node #1</image>
<image id="42">Inserted Node #0</image>
</media>
</node>
</root>