PhpStorm 8.0.0 Web Help

To toggle between upper case and lower case
  1. Select text fragment, or just place the caret at the line you want to change case in.
  2. On the main menu, choose Edit | Toggle Case, or press Ctrl+Shift+UCtrl+Shift+UCtrl+Shift+UCtrl+Shift+UCtrl+Shift+UCtrl+Shift+UCtrl+U, SCtrl+Shift+U, Ctrl+Shift+X or Ctrl+Shift+YShift Command UShift Command UShift Command X or Shift Command Y.

See Also

Getting Started:

Web Resources: