我在本地语言中使用wp字幕插件作为标题，默认wordpress标题作为英语标题。我需要插件生成的字幕作为facebook上共享文章的标题。

get_the_subtitle();

以上代码是用于调用子标题的插件特定函数。

我使用下面显示的代码（在function.php中）作为Facebook开放图元数据来实现我的目标。

  echo \'<meta property="og:title" content="\' . get_the_subtitle() . \'"/>\'; 

但只有我得到默认的wordpress标题为og:title content. 下面是php函数中的代码。

//Adding the Open Graph in the Language Attributes
function add_opengraph_doctype( $output ) {
    return $output . \' xmlns:og="http://opengraphprotocol.org/schema/" xmlns:fb="http://www.facebook.com/2008/fbml"\';
}
add_filter(\'language_attributes\', \'add_opengraph_doctype\');

//Lets add Open Graph Meta Info

function insert_fb_in_head() {
    global $post;
    if ( !is_singular()) //if it is not a post or a page
        return;
    echo \'<meta property="fb:admins" content="XXXXXXX"/>\';
    echo \'<meta property="og:title" content="\' . get_the_subtitle() . \'"/>\';
    echo \'<meta property="og:type" content="article"/>\';
    echo \'<meta property="og:url" content="\' . get_permalink() . \'"/>\';
    echo \'<meta property="og:site_name" content="KERALA NEWS"/>\';
    if(!has_post_thumbnail( $post->ID )) { //the post does not have featured image, use a default image
        $default_image="http://www.example.com/wp-content/themes/dw-focus-master/assets/img/logo.png"; //replace this with a default image on your server or an image in your media library
        echo \'<meta property="og:image" content="\' . $default_image . \'"/>\';
    }
    else{
        $thumbnail_src = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), \'medium\' );
        echo \'<meta property="og:image" content="\' . esc_attr( $thumbnail_src[0] ) . \'"/>\';
    }
    echo "
    ";
}
add_action( \'wp_head\', \'insert_fb_in_head\', 5 );

// default is 10; I\'m using 11 arbitrarily
add_action( \'wp_head\', \'insert_fb_in_head\', 11 );