I'm using active form for the generating the form.
<?php $form = ActiveForm::begin(); ?>
<?= $form->field($model, 'name') ?>
<?= $form->field($model, 'designation') ?>
<?= $form->field($model, 'description')->textarea(['rows' => 6]) ?>
<?= $form->field($model, 'facbook_url')?>
<?= $form->field($model, 'twitter_url')?>
<?= $form->field($model, 'pinterest_url')?>
<?php ActiveForm::end(); ?>
I want to add a custom fields in this which is not there in model.