title: vs code phpcs only works sometimes
body: <p>Sometimes I open a php file in VS Code and no linting occurs until I open the linting console from the bottom, switch over to the terminal pane where a dialog shows up that asks me if I trust the authors of this workspace.  If I say yes then linting errors are shown until I close VS Code.</p>
  <p>Other times, I open a php file in vs code, no linting errors show so I open the linting console from the bottom and switch over to the terminal pane but nothing happens.</p>
  <p>There is no pattern that I can see as to when the linter will work and when it will do nothing.  I have never encountered a problem like this.  Does anyone know anything about this problem?</p>