Ctrl+D performs the find_under_expand
command in sublime. This basically searched for the next occurrence of the already selected text and sel
PhpStorm has a "Select Word at Caret", Ctl+W and Ctl+Shift+W respectively (you can check your keys by searching under Preferences > Keymap).
Detail here: http://www.jetbrains.com/phpstorm/webhelp/selecting-text-in-the-editor.html#d617165e275
Not entirely sure if it's the same as you mentioned, but it's mighty handy!