wighair/appfront/theme/terry/theme01/widgets/topsearch.php

<form    method="get" name="searchFrom"  action="<?= Yii::$service->url->getUrl('catalogsearch/index');?>" class="form-search js_topSeachForm">
    <button type="submit" class="search-button" style="cursor:pointer">
        <span>
            <i>
                <img src="<?= Yii::$service->image->getImgUrl('images/search.png','appfront'); ?>" style="width: 20px;">
            </i>
        </span>
    </button>
    <div class="searchBtn">
        <input type="text"  value="<?=\Yii::$service->helper->htmlEncode(Yii::$app->request->get('q'));  ?>" maxlength="150" placeholder="<?= Yii::$service->page->translate->__('Products keyword'); ?>" class="input-text searchArea js_k2 ac_input" name="q">
    </div>
</form>