CakePHP 创建验证器
可以通过在控制器中添加以下代码来创建验证器:
use Cake\Validation\Validator; $validator = new Validator();
验证数据
一旦我们创建了验证器,我们就可以使用验证器对象来验证数据,以下代码解释了我们如何验证登录网页的数据:
$validator->notEmpty('username', 'We need username.')->add( 'username', 'validFormat', ['rule' => 'email','message' => 'E-mail must be valid']); $validator->notEmpty('password', 'We need password.'); $errors = $validator->errors($this->request->data());
使用 $validator 对象,我们首先调用notEmpty()方法,确保用户名不能为空,之后调用add()方法验证电子邮件格式。
使用 notEmpty() 方法验证密码字段,确报密码字段不能为空。
例子
修改config/routes.php文件,如下所示:
<?php use Cake\Http\Middleware\CsrfProtectionMiddleware; use Cake\Routing\Route\DashedRoute; use Cake\Routing\RouteBuilder; $routes->setRouteClass(DashedRoute::class); $routes->scope('/', function (RouteBuilder $builder) { $builder->registerMiddleware('csrf', new CsrfProtectionMiddleware([ 'httpOnly' => true, ])); $builder->applyMiddleware('csrf'); // $builder->connect('/pages',['controller'=>'Pages','action'=>'display', 'home']); $builder->connect('validation',['controller'=>'Valids','action'=>'index']); $builder->fallbacks(); });
新建src/Controller/ValidsController.php文件,并将以下代码复制到该文件中:
<?php namespace App\Controller; use App\Controller\AppController; use Cake\Validation\Validator; class ValidsController extends AppController{ public function index(){ $validator = new Validator(); $validator->notEmpty('username', 'We need username.')->add( 'username', 'validFormat', ['rule' => 'email','message' => 'E-mail must be valid']); $validator->notEmpty('password', 'We need password.'); $errors = $validator->errors($this->request->getData()); $this->set('errors',$errors); } } ?>
新建src/Template/Valids/index.php文件,并将以下代码复制到该文件中:
<?php if($errors) { foreach($errors as $error) foreach($error as $msg) echo '<font color="red">'.$msg.'</font><br>'; } else { echo "No errors."; } echo $this->Form->create(NULL,array('url'=>'/validation')); echo $this->Form->control('username'); echo $this->Form->control('password'); echo $this->Form->button('Submit'); echo $this->Form->end(); ?>
访问http://localhost/cakephp4/validation执行上述示例,不输入任何内容,点击submit按钮,输出如下所示:
Http - 客户端
http 客户端可用于发出 GET、POST、PUT 等请求。
要使用 http 客户端,添加以下代码:
use Cake\Http\Client;
让我们通过示例来了解 HTTP 客户端的工作。
HTTP GET 方法
要从给定的 http url 中获取数据,可以执行以下操作:
$response = $http->get('https:// jsonplaceholder.typicode.com/users');
如果需要传递一些查询参数,可以按如下方式传递:
$response = $http->get('https:// jsonplaceholder.typicode.com/users', ["id", 1]);
要获得响应,可以执行以下操作:
对于普通文本数据:
$response->getBody();
对于Json:
$response->getJson();
对于Xml:
$response->getXml()
例子
修改config/routes.php文件,如下所示:
<?php use Cake\Http\Middleware\CsrfProtectionMiddleware; use Cake\Routing\Route\DashedRoute; use Cake\Routing\RouteBuilder; $routes->setRouteClass(DashedRoute::class); $routes->scope('/', function (RouteBuilder $builder) { $builder->registerMiddleware('csrf', new CsrfProtectionMiddleware([ 'httpOnly' => true, ])); $builder->applyMiddleware('csrf'); // $builder->connect('/pages',['controller'=>'Pages','action'=>'display', 'home']); $builder->connect('getData',['controller'=>'Requests','action'=>'index']); $builder->fallbacks(); });
新建src/Controller/RequestsController.php文件,并将以下代码复制到该文件中:
<?php namespace App\Controller; use App\Controller\AppController; use Cake\Http\Client; class RequestsController extends AppController{ public function index(){ $http = new Client(); $response = $http->get('https:// jsonplaceholder.typicode.com/users'); $stream = $response->getJson(); $this->set('response',$stream); } } ?>
新建src/Template/Requests/index.php文件,并将以下代码复制到该文件中:
<h3>All Users from url : https:// jsonplaceholder.typicode.com/users<?php if($response) { foreach($response as $res => $val) { echo '<font color="gray">Name: '.$val["name"].' Email -'.$val["email"].'</font><br>'; } } ?>
访问http://localhost/cakephp4/getData执行上述示例,不输入任何内容,点击submit按钮,输出如下所示:
HTTP POST 方法
要使用 post,你需要调用 $http 客户端,如下所示:
$response = $http->post('yoururl', data);
例子
修改config/routes.php文件,如下所示:
<?php use Cake\Http\Middleware\CsrfProtectionMiddleware; use Cake\Routing\Route\DashedRoute; use Cake\Routing\RouteBuilder; $routes->setRouteClass(DashedRoute::class); $routes->scope('/', function (RouteBuilder $builder) { $builder->registerMiddleware('csrf', new CsrfProtectionMiddleware([ 'httpOnly' => true, ])); $builder->applyMiddleware('csrf'); // $builder->connect('/pages',['controller'=>'Pages','action'=>'display', 'home']); $builder->connect('postData',['controller'=>'Requests','action'=>'index']); $builder->fallbacks(); });
新建src/Controller/RequestsController.php文件,并将以下代码复制到该文件中:
<?php namespace App\Controller; use App\Controller\AppController; use Cake\Http\Client; class RequestsController extends AppController{ public function index(){ $http = new Client(); $response = $http->post('https:// postman-echo.com/post', [ 'name'=> 'ABC', 'email' => 'xyz@gmail.com' ]); } } ?>
创建目录Requestsat源代码/模板并在该目录下创建一个View名为 index.php 的文件。将以下代码复制到该文件中。
新建src/Template/Requests/index.php文件,并将以下代码复制到该文件中:
<h3>Testing Post Method</h3>
访问http://localhost/cakephp4/postData执行上述示例,输出如下所示:
同样,你可以尝试使用 PUT 方法:
$http = new Client(); $response = $http->put('https:// postman-echo.com/post', [ 'name'=> 'ABC', 'email' => 'xyz@gmail.com' ]);