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/