1. Protection course(part 6)-E commerce websites-
(Tutorials/Technical)

...  How will you encrypt them its up to you,there are allot of tools and frameworks that will do the job for you like phplockit,ioncube,zend and more.You can also encrypt it with php functions like ...

2. How to Protect your php code
(Tutorials/Technical)

... made for scramble the code.Mostly used are Zend and Ioncube and of course my favorite PHPlockit(commercial)all of them have their advantages and one disadvantage they can be decrypted like everything else ...