Merge two xml files based on common attribute

Question

I have two xml files with a similar structure, and I need to merge them based on a common attribute. To be more explicit, here are two samples:

file1.xml

Answer 1

You can use the attribute() function of SimpleXML

$xml = simplexml_load_file($filename);
foreach($xml->Products->record->attributes() as $attribute => $value) {
    //do something
}