Snippet of using validation and filters for form submission data using phalcon

phalcon-validation-example.php

<?php
/**
 * Snippet of using validation and filters for form submission
 * data using phalcon.
 *
 * The "simple" project was created using phalcon dev tools
 */


/**
 * app/config/config.php
 */
return new \Phalcon\Config([
    'application' => [
        // add
        'validatorsDir'  => APP_PATH . '/validators/',
    ]
]);


/**
 * app/config/loader.php
 */
$loader->registerDirs(
    [
        // add
        $config->application->validatorsDir
    ]
)->register();


/**
 * app/validators/RegisterFormValidator.php
 */
use Phalcon\Validation;
use Phalcon\Validation\Validator\Email;
use Phalcon\Validation\Validator\PresenceOf;

class RegisterFormValidator extends Validation
{
  public function initialize()
  {
    $this->add("username",
      new Email([
        "message" => "The username is not valid",
      ])
    );

    $this->add("username",
      new PresenceOf([
        "message" => "The username is required",
      ])
    );

    $this->add("password",
      new PresenceOf([
        "message" => "The password is required",
      ])
    );
  }
}


/**
 * app/controllers/SessionController.php
 */
class SessionController extends \Phalcon\Mvc\Controller
{
  public function registerAction()
  {
    if ( $this->request->isPost() ) {
      $validation = new RegisterFormValidator();
      $messages = $validation
        ->setFilters( "username", [ "trim", "lower", "email", "striptags" ] )
        ->setFilters( "password", [ "trim", "string" ] )
        ->validate( $this->request->getPost() );

      foreach ( $messages as $message ) {
        $this->flash->error($message);
      }
    }
  }
}