问题
I'm looking to set up a few virtual hosts for different domains for a few friends, and want to know if one virtual host can access files from another host, whether it be via PHP or any other option or if it's totally isolated, so any scripts they can run would only affect their area.
回答1:
An Apache "virtual host" is just a mapping of a hostname (or ip address or port) to a particular set of configuration directives. There is no "containment" or isolation implied by this; everything is still running on the same host.
If you want to actually isolate applications, consider investigating container technology like Docker (or a virtual machine solution), with a front-end proxy directing traffic as necessary to the appropriate backend.
来源：https://stackoverflow.com/questions/36900956/can-a-virtual-host-on-apache-access-the-files-of-another-virtual-host