I use Red Hat 7.0+PHP 4.06 to write a web page to let the users can upload files to the server.
The files are successfully uploaded to the server,but the files are added words "Content-Type: application/octet-stream" in the head of the files.The words make the files such as MS-word , MS-excel to be coded badly.How can I solve it ?

copy($filename,"/var/www/html/data/upload/board/$targetfile");