php-screw-plus

There is a need to encrypt the php codes.

Here is free solution besides zend-guard:
1. php-screw: http://blog.csdn.net/water_cow/article/details/41872091
2. Based on php-screw, php-screw-plus works great. https://github.com/del-xiong/screw-plus
免费开源的php加密扩展，使用aes加密，服务器未破解的情况下99.99999%安全