How to validate email and email already exist or not check, in Yii Framework?

Question

How to validate email using Yii Model validation rules function code. Also how to check email exist or not using Model validation rules function in Yii.

Answer 1

For Yii2 I used the following in a model called Register which will use the User Class.

public function rules()
{
    return [

        ['Email', 'filter', 'filter' => 'trim'],
        ['Email', 'required'],
        ['Email', 'email'],
        ['Email', 'unique', 'targetClass' => '\common\models\User', 'message' => 'This email address has already been taken.'],

    ];
}

You need to use targetClass and put the Namepsace for the Class User