您需要在其中一个WooCommerce产品对象上使用这些方法

例如：

function insert_fb_in_head() {
    global $post;
    if ( !is_singular()) //if it is not a post or a page
        return;
        echo \'<meta property="og:title" content="\' . get_the_title() . \'"/>\';
        echo \'<meta property="og:type" content="article"/>\';
        echo \'<meta property="og:url" content="\' . get_permalink() . \'"/>\';
        echo \'<meta property="og:site_name" content="My Website"/>\';
    if( isset( $gallery_image_ids[1] ) ) { //the post does not have featured image, use a default image
        $default_image="https://www.website.com"; //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{
        $product = wc_get_product($post->ID);
        $image = wp_get_attachment_image_src($product->get_image_id(), \'full\');
        echo \'<meta property="og:image" content="\' . $image . \'"/>\';
    }
    echo "
";
}
add_action( \'wp_head\', \'insert_fb_in_head\', 5 );

感谢您的帮助，但该代码中的某些内容破坏了网站（可能是我们中的一个人的小疏忽）。：）

然而，我确实在另一块板上找到了一个很好的解决方案，我想在这里分享它，以帮助其他人。

贷记至helgatheviking 来自WooCommerce社区的Slack。

function insert_fb_in_head() {
    global $post;
    // If it is not a post or a page.
    if ( ! is_singular() ) { 
        return;
    }
    echo \'<meta property="og:title" content="\' . get_the_title() . \'"/>\';
    echo \'<meta property="og:type" content="article"/>\';
    echo \'<meta property="og:url" content="\' . get_permalink() . \'"/>\';
    echo \'<meta property="og:site_name" content="My Website"/>\';
    $gallery_image_ids = get_post_meta( $post->ID, \'_product_image_gallery\', true );
    $gallery_image_ids = wp_parse_id_list( $gallery_image_ids );
    // The product has product gallery, use a default image.
    if( ! empty ( $gallery_image_ids ) ) {
        $thumbnail_src = wp_get_attachment_image_url( current( $gallery_image_ids ), \'single-post-thumbnail\' );
        echo \'<meta property="og:image" content="\' . esc_attr( $thumbnail_src ) . \'"/>\';     
    } else {
        // The post does not have featured image, use a default image.
        $default_image="https://www.website.com"; //replace this with a default image on your server or an image in your media library
        echo \'<meta property="og:image" content="\' . $default_image . \'"/>\';
    }
}
add_action( \'wp_head\', \'insert_fb_in_head\', 5 );