<?php
use yii\helpers\Html;

/* @var $this yii\web\View */
/* @var $user common\models\User */

$activationLink = Yii::$app->urlManager->createAbsoluteUrl ( [ 
		'validation/validation',
		'token' => $user->activation_key 
] );
?>
<div class="user-validation">
  <p>Dear Administator,</p>
  
  <p>A new user signed up!</p>

  <p>Follow the link below to validate the new user:</p>

  <p><?= Html::a(Html::encode($activationLink), $activationLink) ?></p>
</div>