Automatic Download script in Php

Some website has functionality  .... when we open the web site automatic some file  downloading will start 

here i m  write simple Php script to start  automatic download when page is  loaded .......

      header ('Content-type:application/doc');

   //   Doc is your document type u can change it 

      header ('Content-Disposition:attachement;filename="xyz.doc") 

  //    xyz..doc is your document  ready to download 

    exit();

?>