title: Protect my source code from end user
body: <p>I have PHP script that do something. My customer has his own server. I don't want him to see source code but the script must running on his server.</p>
  
  <p>Is there any technique to do that? Something like encryption or something else? I'm looking for encryption technique or something else that I don't know right now.</p>
  
  <p>Server is linux-based.</p>