<form role="search" method="get" class="search-form" action="<?php echo esc_url(home_url('/')); ?>">
    <label>
        <span class="screen-reader-text"><?php _ex('Search for:', 'label', 'mesmerize'); ?></span>
        <input type="search" class="search-field" placeholder="<?php esc_attr_e('Search &hellip;', 'mesmerize'); ?>" value="<?php echo get_search_query(); ?>" name="s"/>
    </label>
</form>