Replace & Modify XML node in PHP - php

Question

Here's a sample XML structure:
<Products>
<Product>
<Id>1</Id>
<Name>Product 1</Name>
<Category>MEN</Category>
<Category>Women</Category>
<Product>
<Product>
<Id>2</Id>
<Name>Product 2</Name>
<Category>MEN2</Category>
<Category>Women2</Category>
<Product>
</Products>
And I want the file like this:
<Products>
<Product>
<Id>1</Id>
<Name>Product 1</Name>
<CategoryName>MEN:Women</CategoryName>
<Product>
<Product>
<Id>2</Id>
<Name>Product 2</Name>
<CategoryName>MEN:Women</CategoryName>
<Product>
</Products>
So basically it will search through the nodes in products. If it finds "Category", it will change the name to "CategoryName" and concatenate all the sub-sequent category node values into a single one separated by semicolon.
So I have wrote this small PHP, but not sure how to get this to work.
<?php
$xmlFile = "test.xml" //assume the contents are in the file
$xml = simplexml_load_file($xmlFile);
foreach($xml as $item)
{
$name = $item->Product;
if($name->count()) //check if its a "product" node
{
foreach($item as $i)
{
$category = $i->Category;
}
}
}
?>
Can someone point me to the right direction? I haven't much worked with XML.

Answer 1

Please Use this
<?php
$xmlFile = "test.xml"; //assume the contents are in the file
$xml = simplexml_load_file($xmlFile);
$table = '<Products>';
foreach($xml as $item)
{
$table .= '<Product>';
$table .= '<Id>'.$item->Id.'</Id>';
$table .= '<Name>'.$item->Name.'</Name>';
$table .= '<Category>';
$i = 0;
foreach($item->Category as $cat)
{
if($i>0){
$table .= ':';
}
$table .= $cat;
$i++;
}
$table .= '</Category>';
$table .= '</Product>';
}
$table .= '</Products>';
echo $table;
?>

Answer 2

Try this:
$xml = '<Products>
<Product>
<Id>1</Id>
<Name>Product 1</Name>
<Category>MEN</Category>
<Category>Women</Category>
</Product>
<Product>
<Id>2</Id>
<Name>Product 2</Name>
<Category>MEN2</Category>
<Category>Women2</Category>
</Product>
</Products>';
$dom = new DOMDocument();
$dom->preserveWhiteSpace = false;
$dom->formatOutput = true;
$dom->loadXML( $xml, LIBXML_NOBLANKS );
$xpath = new DOMXPath( $dom );
$ProductNode = $xpath->query( "//Product" );
if( $ProductNode->length ) {
foreach ( $ProductNode as $node ) {
$category = $node->getElementsByTagName( 'Category' );
$str = '';
// store a reference to the nodes,
// so that they can be deleted later
$del = array();
foreach ( $category as $p ) {
$str .= $p->nodeValue . ':';
$del[] = $p;
}
$str = trim( $str, ':' );
$child = $dom->createElement( 'CategoryName', $str );
$node->appendChild( $child );
foreach ( $del as $p ) {
$p->parentNode->removeChild( $p );
}
}
}
header('content-type: text/xml');
echo $dom->saveXML();
Hope it helps.

Answer 3

Use DomDocument, if you want to modify XML while traversing it:
$xml_obj = new DOMDocument();
$xml_obj->loadXML($xml_string, LIBXML_NOBLANKS );
$xml_obj->preserveWhiteSpace = false;
$xml_obj->formatOutput = true;
$products = $xml_obj->getElementsByTagName('Product');
foreach ($products as $product) {
$cats = array();
$categories = $product->getElementsByTagName('Category');
$tot = $categories->length;
$to_delete = array();
for($i = 0; $i < $tot;$i++) {
$cat = $categories->item($i);
$cats[] = $cat->textContent;
$to_delete[] = $cat;
}
foreach ($to_delete as $delete_node) {
$product->removeChild($delete_node);
}
$product->appendChild($xml_obj->createElement('CategoryName', implode(":", $cats)));
}
print ($xml_obj->saveXML());