thank you for your reply
In phpinfo there are many notes about xml. Simplexml is cited in the authors. There is also this:
libxml
libXML support
active
libXML Compiled Version
2.9.14
libXML Loaded Version
20914
libXML streams
enabled
HTTP Headers Information
HTTP Request Headers
HTTP Request
GET /phpinfo.php HTTP/1.1
Host
127.0.0.1
User-Agent
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:102.0) Gecko/20100101 Firefox/102.0
Accept
text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Apache Environment
Variable
Value
HTTP_HOST
127.0.0.1
HTTP_USER_AGENT
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:102.0) Gecko/20100101 Firefox/102.0
HTTP_ACCEPT
text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8