how to obfuscate and encrypt the codeigniter application

I want to obfuscate or encrypt the source code of codeigniter application,
how we can do this.
Please provide any solutions.

thanks 
ravi

@ravallsport

Here is a useful link: https://www.google.com/search?q=php+encr...e&ie=UTF-8

No this is not useful link...

@ravallsport,

How is this not a useful link? It gives you multiple solutions to your answer.