|Project root||Select the folder which is the parent for all the project sources and click this icon or choose Project Root on the context menu of the selection. PhpStorm marks the selected folder with the icon and adds the .idea directory with settings to it.|
|Test Sources||Click this icon to have PhpStorm treat the contents of tje selected folder as related to unit testing. Alternatively, choose Resource Root on the context menu of the selection.|
Click this icon to enable PhpStorm to complete relative paths to resources under the selected folder.
This means that the contents of the selected folder can be referenced relative to it instead of specifying full paths.
Alternatively, choose Resource Root on the context menu of the selection.
|Excluded||Click this button to have PhpStorm ignore the selected directory during indexing, parsing, code completion, etc. Alternatively, choose Excluded on the context menu of the selection.|