PhpStorm 6.0.1 Web Help
Some features described here are available in Ultimate edition only.
You can set up a project around the existing source code created externally.
PhpStorm analyzes the code base, adds the .idea directory with settings, and
marks the project with the special icon
You also create a project from already existing sources when you need to update an application
on a remote host. In this case, the downloaded sources are also arranged in a project.