php及MySQL避免重复提交数据
php防止数据重复提交://获取来访真实IPif ($HTTP_SERVER_VARS["HTTP_X_FORWARDED_FOR"]){ $key = $HTTP_SERVER_VARS["HTTP_X_FORWARDED_FOR"]; }elseif($HTTP_SERVER_VARS["HTTP_CLIENT_IP"]){ $key = $HTTP_SERVER_VAR...