Administrator / test_2

<?php
use yii\widgets\ActiveForm;
use yii\helpers\Html;
use yii\helpers\Url;
?>
<?php $form = ActiveForm::begin(['options' => ['enctype'=> 'multipart/form-data','id'=>'search-form', 'class'=>'search-form'], 'action' => Url::toRoute('site/search'), 'method'=>'get']); ?>

<?= $form->field($model, 'string',[
    'options'=>
        [
            'tag'=>'label',
        ],
    'template' => "{input}",
])->textInput(['maxlength' => 255, 'id'=>'search-field','placeholder' => 'ПОИСК ПО САЙТУ']) ?>
    <input id = "search-buttom" type = "submit"  value="" >
<?php ActiveForm::end(); ?>