<?php
add_filter('get_search_form', function($form) {
$value = get_search_query() ? get_search_query() : '';
$form = '<form action="'.esc_url(home_url("/")).'" class="search-form input-group">
<input type="search" name="s" class="form-control" placeholder="'.esc_attr__( 'Search', 'docly' ).'" value="'.esc_attr($value).'">
<span class="input-group-addon"><button type="submit"><i class="icon_search"></i></button></span>
</form>';
return $form;
});