Slim PHP Respect Validation

A SlimPHP validator using respect validation package.

Install

Via Composer

$ composer require terminusstudio/phpvalidator

Usage

Initializing

Configuration

$config = [
            'useSession' => false 
          ];

• useSession - If set to true, validation results are saved in a session variable that can be accessed in the next request (using the ValidatorMiddleware). Defaults to false.

Using a container

Container::set('validator', function() {
    return new \TS\PHPValidator\Validator($config);
});

Without container

$validator = new \TS\PHPValidator\Validator($config);

Example Usage

public function login($request, $response) {
    if ($request->getMethod() == 'POST')
    {
        $v = Container::get('validator')->validate($request, [
            'email' => v::noWhitespace()->notEmpty()->email(),
            'password' => v::notEmpty()->length(8)->alnum('_'),

        ]);;

        if($v->isValid())
        {
            //Do Processing
        }
     }
    return View::render($response, 'login.twig');
}

Middleware

The ValidatorMiddleware can be added to slim if you set the useSession to true in $config.

  public function postLogin($request, $response) {
        $v = Container::get('validator')->validate($request, [
            'email' => v::noWhitespace()->notEmpty()->email(),
            'password' => v::notEmpty()->length(8)->alnum('_'),
    
        ]);;
    
        if($v->isValid())
        {
            //Do Processing
        }
        
        return $response->withHeader('Location',  Router::getRouteParser()->urlFor('login.get'))->withStatus(302);;
    }

If there were any errors, the next request will have access to the errors and values. To enable the middleware just add ValidatorMiddleware class to the Slim app and pass the validator instance.

$app->add(new \TS\PHPValidator\ValidatorMiddleware(Container::get('validator')));

Twig Extension

This plugin also supports Twig functions. To enable just add ValidatorTwig when initializing twig. This requires slim/twig-view package.

Container::set('view', function() {
    $view = Twig::create(....);

    // Add the validator extension and pass the validator instance to it
    $view->addExtension(
        new \TS\PHPValidator\ValidatorTwig(Container::get('validator'))
    );

    return $view;
});

There are currently 5 functions supported by the extension,

• has_errors() - Returns true if there are any errors
• has_error($key) - Returns true if $key is invalid
• get_errors() - Returns an array containing all errors
• get_error($key, $toString = true) - Returns an array containing all errors for a specific $key. If $toString is set to true, then it returns a string.
• get_value($key, $default = null) - Returns the value for a specific $key.

$key is the field name set in the request.

{% if has_error('email') %}
    {{  get_error('email') }}
{% endif %}
<input type="email" name="email" value="{{ get_value('email') }}">

License

The MIT License (MIT). Please see License File for more information.