I am developing a web-based software with PHP. Right now, the software will be distributed and be installed in desktop computer. Since it's PHP based, when it's installed, the source code could be seen.
Do you have any idea how to secure or protec the source code, so when the software installed in server they couldn't see the source code? or are there any other ways to prevent this?
I know some good system like soureguardian and ioncube, but I wouldn't get them because their price is too high for me. I would appreciate any input.