AutoDestructer PHP [dynamite like]

Supouse that you have a site in an X server, this is a true story, and the people of that server dont agree with your idea of leaving that server to change to another, and they change your password. Is there a way of, with php, if i already have this supose php in that server to delete all the content on my site? like a massive UNLINK ??? deleteng files and directoris?