在我的php项目中，我使用了用this tutorial创建的简单mvc。
这是我的 Bootstrap.php 文件
<?php
class Bootstrap {
private $_url = null;
private $_controller = null;
private $_controllerPath = 'controllers/';
private $_modelPath = 'models/';
private $_errorFile = 'error.php';
private $_defaultFile = 'home.php';
public function init(){
$this->_getUrl();
if(empty($this->_url[0])){
$this->_loadDefaultController();
return false;
}
$this->_loadExistingController();
$this->_callControllerMethod();
}
private function _getUrl(){
$url = isset($_GET['url']) ? $_GET['url'] : null;
$url = rtrim($url, '/');
$url = filter_var($url, FILTER_SANITIZE_URL);
$this->_url = explode('/', $url);
}
private function _loadDefaultController() {
require $this->_controllerPath . $this->_defaultFile;
$this->_controller = new Home();
$this->_controller->index();
}
private function _loadExistingController() {
$file = $this->_controllerPath . $this->_url[0] . '.php';
if(file_exists($file)) {
require $file;
$this->_controller = new $this->_url[0];
$this->_controller->loadModel($this->_url[0], $this->_modelPath);
} else {
$this->_error();
return false;
}
}
private function _callControllerMethod() {
if(isset($this->_url[2])) {
if(method_exists($this->_controller, $this->_url[1])) {
$this->_controller->{$this->_url[1]}($this->_url[2]);
} else {
$this->_error();
}
} else {
if(isset($this->_url[1])) {
if(method_exists($this->_controller, $this->_url[1])) {
$this->_controller->{$this->_url[1]}();
} else {
$this->_error();
}
} else {
$this->_controller->index();
}
}
}
private function _error() {
require $this->_controllerPath . $this->_errorFile;
$this->_controller = new Error();
$this->_controller->index();
exit;
}
}
控制器
<?php
class Controller {
function __construct() {
$this->view = new View();
}
public function loadModel($name, $modelPath = 'models/') {
$path = $modelPath . $name .'_model.php';
if(file_exists($path)) {
require $modelPath . $name .'_model.php';
$modelName = $name . '_Model';
$this->model = new $modelName();
}
}
}
和用户控制器
<?php
class User extends Controller {
function __construct(){
parent::__construct();
}
public function registration() {
$this->view->render('user/registration');
}
public function enter() {
$this->view->render('user/enter');
}
public function create() {
$data = array();
$data['name'] = $_POST['name'];
$data['password'] = $_POST['password'];
$data['role'] = 2;
$this->model->create($data);
header('location: ' . URL);
}
}
我添加了客户端验证（name和password字段不能为空）但我也想添加服务器端验证，但我不明白这里如何返回数据是否会发现错误返回查看？我想，我需要从正确填充的字段中返回错误和数据。
答案 0 :(得分：2)
使用会话传递验证错误。这是一个例子......
$_SESSION['error'] = array(
'message' => 'Invalid username/password combination',
'for' => 'login-form',
'variables' => array(
'username' => $_POST['username'],
),
);
然后在前端，您可以检查会话是否包含错误变量或您选择命名它的任何内容。如果是，您可以继续打印错误。
我实际上为我正在制作的大学课程制作了类似的轻量级框架，并查看了一些代码可能对您有所帮助。 Check it out.
在您的申请背景下进一步解释这一点......
class User extends Controller {
...
public function create() {
$data = array();
$data['name'] = $_POST['name'];
$data['password'] = $_POST['password'];
$data['role'] = 2;
// lets assume that the create method on the model will return true when it is successfully created,
// and then false in the event that there was an error when creating/inserting it. I am assuming that
// the session has already been created.
if (!$this->model->create($data)) {
// there was an error so lets set the error message
$_SESSION['errors'] = [
'form' => 'user-create',
'message' => 'There was an error creating the user',
];
}
header('location: ' . URL);
}
}
我假设你已经开始了一个会话。如果会话不存在，则无法在会话中设置变量。要解决此问题，请在bootstrapping / index文件中使用session_start（）。
然后在您的视图中，您可以使用类似代码检查错误...
if (isset($_SESSION['error']) && count($_SESSION['error']) > 0) {
echo '<ul>';
foreach ($_SESSION['error'] as $error) {
echo '<li>' . $error['messsage'] . '</li>';
}
echo '</ul>';
}
这将检查它们是否是错误集（有几种方法可以做到这一点，但我总是只计算错误）。然后我们可以遍历每个错误并将其打印为HTML无序列表供用户查看。
答案 1 :(得分：1)
要扩展我的评论，您可以尝试使用查询参数和$_GET超全局。例如，在您的控制器中：
<?php
class User extends Controller {
function __construct(){
parent::__construct(); //This isn't needed as it's redundant
}
public function registration() {
$this->view->render('user/registration');
}
public function enter() {
$this->view->render('user/enter');
}
public function create() {
$name = isset($_POST['name']) ? $_POST['name'] : "";
$password = isset($_POST['password']) ? $_POST['password'] : "";
if(empty($name) || empty($password)){
//Redirect to your login form with the query parameter
//errorMessage which will be used with $_GET
header('Location: loginPage.php?errorMessage=Username and password cannot be empty!');
exit();
}
$data = array();
$data['name'] = $_POST['name'];
$data['password'] = $_POST['password'];
$data['role'] = 2;
$this->model->create($data);
header('location: ' . URL);
}
}
然后在包含表单的页面上，您可以执行以下操作：
<?php
//This is loginPage.php from the controller example
//Other code up here if you have it
if(isset($_GET['errorMessage'])){
//If there is a query parameter with the key 'errorMessage'
//it will echo this out
echo '<span class="error">' . $_GET['errorMessage'] . '</span>';
}
?>
<form>
<input type="text" name="password" />
<input type="password" name="name" />
</form>