PHP利用pcntl_exec突破disable_functions
http://fuck.0day5.com/?p=563
PHP突破Disable_functions执行Linux命令
利用dl函数突破disable_functions执行命令
http://www.xfocus.net/articles/200704/915.html
编写PHP扩展三步曲
http://blog.csdn.net/taft/article/details/596291
http://blog.csdn.net/alexdream/article/details/2213344