https://www.w3schools.com/PhP/func_simplexml_load_file.asp
PHP simplexml_load_file() Function
Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML...
phpsimplexmlloadfilefunction
https://www.php.net/manual/fr/book.simplexml.php
PHP: SimpleXML - Manual
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https://way2tutorial.com/xml/php-generate-xml.php
PHP Generate XML file - SimpleXML, DOM, Reader/Writer Method
Generate XML file in PHP SimpleXML DOM Reader/Writer Method. Generate XML file dynamically using PHP three different method, DOM XML Reader/Writer SimpleXML
phpgeneratexmlfiledom