Explain how vdn-php work

README.md

@@ -35,6 +35,19 @@ Run the pipeline named `default`:
 vdn-drone exec --pipeline default
 ```
 
+## `vdn-php`
+
+Run PHP 8.2 in your current host directory. It forwards the server port and mounts the files in the VDN guest system.
+
+Run the PHP integrated server:
+
+```bash
+vdn-php -S 0.0.0.0:8000
+#vdn-php -S localhost:8000 # This will not work, the server needs to listen on all adresses!
+```
+
+On your host system, use your favorite browser and check your website at `http://localhost:8000`.
+
 ## `vdn-rsync`
 
 Copy files between the host and the guest system using *rsync*.