wordpress面包屑导航简单实现

echo '<div class="breadcrumb">';
    // If there is a parent, display the link.
    $parent_title = get_the_title( $post->post_parent ); 
    if ( $parent_title != the_title( ' ', ' ', false ) ) {
        echo '<a href="' . esc_url( get_permalink( $post->post_parent ) ) . '" alt="' . esc_attr( $parent_title ) . '">' . $parent_title . '</a> » ';
    } 
    // Then go on to the current page link.
    echo '<a href="' . esc_url( get_permalink() ) . '" rel="bookmark" alt="' . esc_attr( the_title_attribute() ) . '">' . the_title() . '</a>';
echo '</div>';