在WooCommerce single product页面中添加OpenGraph标签

function add_opengraph_tags() {
    if (is_product()) {
        global $product;
        $post = get_post($product->get_id());
        $image = wp_get_attachment_image_src(get_post_thumbnail_id($post->ID), 'single-post-thumbnail');
        $description = $post->post_excerpt ? $post->post_excerpt : $post->post_content;
        
        echo '<meta property="og:title" content="' . get_the_title() . '">';
        echo '<meta property="og:description" content="' . $description . '">';
        echo '<meta property="og:type" content="product">';
        echo '<meta property="og:url" content="' . get_permalink() . '">';
        echo '<meta property="og:image" content="' . $image[0] . '">';
    }
}
add_action('wp_head', 'add_opengraph_tags');