ADD microdata markup for Google sitelinks search box in WP search form

microdata-markup-google-sitelink-searchbox

<div itemscope itemtype="http://schema.org/WebSite">
    <meta itemprop="url" content="<?php esc_url( echo home_url( '/' ) ); ?>"/>
    <form itemprop="potentialAction" itemscope itemtype="http://schema.org/SearchAction" role="search" method="get" id="searchform" action="<?php echo esc_url( home_url( '/' ) ); ?>">
        <div>
            <label class="visually-hidden" for="s"><?php _e( 'Search for:', 'themeslug' ); ?></label>
            <meta itemprop="target" content="<?php esc_url( echo home_url( '/' ) ); ?>?s={s}"/>
            <input itemprop="s" type="search" value="<?php the_search_query(); ?>" name="s" id="s" class="searchfield" placeholder="<?php _e( 'Input search terms', 'themeslug'); ?>" />
            <input type="submit" id="searchsubmit" class="searchsubmit" value="<?php _e( 'Search' ); ?>" />
        </div>
    </form>
</div>

Lines 2 and 6 have one echo statement that should be pulled out of the esc_url(); I see you fixed this on line 3 in the last revision.