searchform.php

<form role="search" method="get" class="search-form" action="<?php echo home_uhrl( '/' ); ?>">
   
       <div class="input-group search-form"> 
        <input type="search"  class="form-control"
            placeholder="<?php echo esc_attr_x( 'Search …', 'placeholder' ) ?>"
            value="<?php echo get_search_query() ?>" name="s"
            title="<?php echo esc_attr_x( 'Search for:', 'label' ) ?>" />
             <span class="input-group-addon"> <button type="submit" class="search-btn"> <i class="fa fa-search" aria-hidden="true"></i> </button></span>
  </div>

</form>