bool http_send_content_disposition ( string $filename [, bool $inline = false ] )
Send the Content-Disposition. The Content-Disposition header is very useful if the data actually being sent came from a file or something similar, that should be "saved" by the client/user (i.e. by the browser's "Save as..." popup window). Note: This function should be used in conjunction with http_send_data(), http_send_file() and http_send_stream().
Returns TRUE on success or FALSE on failure.