PhpStorm allows you to navigate directly to a desired action without digging through menus and toolbars, and using only the keyboard. It defines actions as:
The commands of the main menu and various context menus, commands performed through the toolbar buttons of the main toolbar and tool windows.
Press Cmd+Shift+A (Ctrl+Shift+A on Windows/Linux) to bring up the Actions popup that allows you to search for an action by name.