如何使用直接发送到电子邮件的附件制作“安全”表单？

question explains all, I managed to do the basic form info to email part but I'm confused when it comes to security and uploads. I'm not looking for a direct answer on how to program it but rather links explaining how this can be made and how to avoid having a badly programed form with no security and bugs and some demos (ps: my php skills are really low.)question explains all, I managed to do the basi