title: Transmitting raw bytes via HTTP
body: <p>I am making a product that requires modules to be loaded.
  The current idea is to exchange some assymetric keys that will inform client and server about an AES (Rijndael) 256 bit key, and exchange the DLL module that way.  However, since the serverside is written in PHP I need an efficient way of transmitting the encrypted DLL bytes. The only solutions I've seen online so far is encoding the bytes with base64 or hex and doing it that way. Even though I am using a host that has unlimited bandwidth, I still think it's inefficient and a waste of good bandwidth. I was hoping some PHP experts could tell me whether there is a way to output raw bytes in an HTTP response.</p>