How to validate input in Yii?
1 answer
by
arnoldo.moen ,
2 years ago
@darion
In Yii, you can use several built-in validators to validate form input. Here are the steps to validate input in Yii:
- Define validation rules: In your model class, define the validation rules for each attribute. For example:
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public function rules() { return [ [['name', 'email'], 'required'], ['email', 'email'], ['age', 'integer', 'min' => 18], ]; } |
- Perform validation: In your controller, create a model instance and call the validate() method on it. For example:
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$model = new User(); if ($model->load(Yii::$app->request->post()) && $model->validate()) { // Input is valid, perform further actions } else { // Input is invalid, show form with error messages return $this->render('create', ['model' => $model]); } |
- Display error messages: In your view, use the getErrors() method to display error messages. For example:
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if ($model->hasErrors()) { foreach ($model->getErrors() as $attribute => $errors) { foreach ($errors as $error) { echo $model->getAttributeLabel($attribute) . ' ' . $error . ''; } } } |
With these steps, you can validate input in Yii using built-in validators. You can also create custom validators if needed.