Parsing xml with unknown structure and nesting level?

Question

PHP

Good afternoon!
There are large xml documents into which lists of VMs from virtualization are uploaded, since the VMs are located in different folders and different clusters, the files have a structure with different levels of nesting, the element can be either at level 2 or at 10. Using php, you need to pull out from the tag value file and their descendants , . The tag itself can be at any level.
Can you tell me how this can be done?

Answer 1

1 read the tag - parse if virtual, then parse the block, if not, go deeper

Answer 2

you can find patterns using regular expressions