About vim Automatically Adding Annotation Plug-ins

  question, vim

I downloaded DoxygenToolkit.vim on the website.
Then I put this plug-in into the installation directory /usr/share/vim/vimfiles/plugin.
Then /etc/vimrc was modified.
vim

According to the documentation, I created a. php file
But at the command line input: Dox is not, promptNothing to document here!

May I ask you what went wrong? Thank you

Use: Dox assumes that there is code on the next line where the current cursor is located (any code is possible):
Such as this can be图片描述