How to validate a variable in PHP using standard Yii2 validators without creating a model?

Question

By the book, you suppose to manage post requests with core validators and rules that are described within a model. The problem comes up if you want to use a separate variable elsewhere.

First you get it from the request i.e.

$var = \Yii::$app->request->post('var');

Then you need to validate it before use. For example, it needs to be an email. Yii2 has a standard validator 'email', but how do I apply it separately?

I would assume something like this:

if( !\Yii::$app->coreValidator( $var, $rule ) )
    return $this->error();

Insane Skull · Accepted Answer · 2015-10-31T09:56:49.303

2

For Example,

$email = 'test@example.com';
$validator = new yii\validators\EmailValidator();

 if($validator->validate($email, $error)) {
  echo 'Email is valid.'; 
 } 
 else {
  echo $error;
 }

Validate Variable Without Model

You can use any validator or make your own validator by extending Validators Class.

edited Oct 31 '15 at 09:56

answered Oct 31 '15 at 09:47

Insane Skull

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Yep, also just found it accidentally in official documentation: [Ad Hoc Validation](http://www.yiiframework.com/doc-2.0/guide-input-validation.html#ad-hoc-validation) – Danil Oct 31 '15 at 10:12

score 0 · Answer 2 · answered Oct 31 '15 at 09:20

You can create simple validator

namespace app\components;
use yii\validators\Validator;

class CountryValidator extends Validator
{

    public function validateAttribute($model, $attribute)
    {
        if (!in_array($model->$attribute, ['USA', 'Web'])) {
            $this->addError($model, $attribute, 'The country must be either "USA" or "Web".');
        }
    }
}

This is a link of offical doucmentation Yii2

How to validate a variable in PHP using standard Yii2 validators without creating a model?

2 Answers2