PHP简单利用 token 防止表单重复提交<?php /** PHP简单利用token防止表单重复提交* 此处理方法纯粹是为了给初学者参考*/session_start();function set_token() { $_SESSION['token'] = md5(microtime(true));}function valid_token() { $return = $_REQUEST['token'] === $_SESSION['token'] ? true : false; set_token(); return $return;}//如果token为空则生成一个tokenif(!isset($_SESSION['token']) || $_SESSION['token']=='') { set_token();}if(isset($_POST['test'])){ if(!valid_token()){ echo "token error"; }else{ echo '成功提交，Value:'.$_POST['test']; }}?><form method="post" action=""> <input type="hidden" name="token" value="<?php echo $_SESSION['token']?>"> <input type="text" name="test" value="Default"> <input type="submit" value="提交"> </form>转载自：http://www.heqee.com/php-token-prevent-duplicate-form-submit/
