open PhpNewFileDialog.

dialog.java

  protected dialog(AnActionEvent e) throws Exception {
    Project project = e.getProject();

    DataContext dataContext = e.getDataContext();
    IdeView view = LangDataKeys.IDE_VIEW.getData(dataContext);
    if (view == null) {
      return;
    }

    Project project = PlatformDataKeys.PROJECT.getData(dataContext);

    PsiDirectory dir = view.getOrChooseDirectory();
    if (dir == null || project == null) return;

    new PhpNewFileDialog(project, dir).show();
  }