They are dynamically created subdomains. I don't know the names and how much they are, I need to loop the domain to get all the subdomains so I it's something like
foreach domain as subdomain{
// do something
}
could it be done with PHP?
It's been 2 days, so the conclusion is, there's no way to do this with PHP for now.
For all, if you landed here with the same problem, Try to retrieve Multisite Wordpress sub-domains automatically with PHP, you can forget it, for now you should handle all the sub domain manually.