Online PHP editor | output for 9aJe9

<?php $xml = <<<XML <?xml version="1.0" encoding="utf-8"?> <root> <result> <node> <title> Some Title Name</title> <categories> <category> categor_one </category> <category> categor_two </category> </categories> </node> <node> <title> Some Title Name</title> <categories> <category> categor_one </category> <category> categor_tree </category> </categories> </node> </result> </root> XML; $products = array(); $product_data = array(); $xml = simplexml_load_string($xml, "SimpleXMLElement", LIBXML_NOCDATA); foreach ($xml->result->node as $node) { $product_data['title'] = (string)$node->title; foreach($node->categories as $category) { if (is_array($category)) { $product_data['category'] = implode('///', $category); continue; } $product_data['category'] = (array)$category->category; } $products[(string)$node->title][] = $product_data; } $xmlDoc = new DOMDocument('1.0', 'UTF-8'); $root = $xmlDoc->appendChild($xmlDoc->createElement("root")); foreach ($products as $key => $product) { $productA = $root->appendChild($xmlDoc->createElement('product')); $productA->appendChild($xmlDoc->createElement("title", $key)); for ($i = 0; $i < count($product); $i++) { $productA->appendChild($xmlDoc->createElement("category" . $i, implode("///", $product[$i]["category"]))); } } $xmlDoc->formatOutput = true; echo $xmlDoc->saveXML();