Getting data from XML for dummies?

Question

PHP

It would seem that the simplest task is to get a few numbers from an XML document on a third-party site, save it to a variable and display it in a widget on the site.

Started digging. I learned about xPath, but it turns out that they cannot process a document on a third-party server. The question is - how can you just parse XML data on a third-party site and drive it into PHP variables (Or JS variables, if you can work with XML in real time, without having to download the document to your server)?

Answer 1

"they cannot process a document on a third-party server " What does this even mean?
What is the task?
Get file? jQuery.ajax() (vanilla XMLHttpRequest )
Parse a file? jQuery.parseXML() (vanilla your_parser)

Answer 2

php:

$xml = @simplexml_load_file('http://ссылка_на_хмл.xml');
print_r($xml);