<form method ="get" action="<?php echo esc_url(home_url('/'));?>" class="form" id="menu-right-search-form">
    <input id="placeholder" type="text" value="" name="<?php esc_attr_e( 's', 'just-news' );?>" id="<?php esc_attr_e( 's', 'just-news' );?>" placeholder="<?php esc_attr_e( 'search now', 'just-news' );?>">
    <a href="#"><i class="fa fa-search"></i></a>
</form>