紧急求助，投票系统被刷了
现在的做法是根据ip和日期来进行判断的，就是当天的日期检查下有没有相同的ip投票过，也就是说一个ip一天只能投票一次。
现在的情况是某个数据一天被1000+的ip进行了投票，而且验证码我也不知道是怎么绕过去的，难道是因为我验证码是纯数字的，太简单了？
关于那些ip全部都是我们市区的ip，而且投票的频率大概是一两分钟一票。
现在我ip获取是用的getenv('REMOTE_ADDR')，我真的没这方面的经验，求教各位大牛了。
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MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.
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Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software
