PHP amt_get_content_description函数代码示例

function amt_content_description()
{
    $post = apply_filters('amt_get_queried_object', get_queried_object());
    if (!is_null($post)) {
        echo amt_get_content_description($post);
    }
}

function amt_content_description()
{
    $post = get_queried_object();
    if (!is_null($post)) {
        echo amt_get_content_description($post);
    }
}

function amt_content_description()
{
    $options = get_option("add_meta_tags_opts");
    $post = amt_get_queried_object($options);
    if (!is_null($post)) {
        echo amt_get_content_description($post);
    }
}

/**
 * Generates basic metadata for the head area.
 *
 */
function amt_add_basic_metadata_head($post, $attachments, $embedded_media, $options)
{
    $do_description = $options["auto_description"] == "1" ? true : false;
    $do_keywords = $options["auto_keywords"] == "1" ? true : false;
    $do_noodp_description = $options["noodp_description"] == "1" ? true : false;
    // Array to store metadata
    $metadata_arr = array();
    // Robots Meta Tag.
    $robots_content = '';
    if ($do_noodp_description && (is_front_page() || is_singular())) {
        // Add NOODP on posts and pages
        $robots_content = 'NOODP,NOYDIR';
        // Allow filtering of the robots meta tag content.
        $robots_content = apply_filters('amt_robots_data', $robots_content);
    }
    // Add a robots meta tag if its content is not empty.
    if (!empty($robots_content)) {
        $metadata_arr[] = '<meta name="robots" content="' . $robots_content . '" />';
    }
    // Default front page displaying latest posts
    if (amt_is_default_front_page()) {
        // Description and Keywords from the Add-Meta-Tags settings override
        // default behaviour.
        // Description
        if ($do_description) {
            // Use the site description from the Add-Meta-Tags settings.
            // Fall back to the blog description.
            $site_description = $options["site_description"];
            if (empty($site_description)) {
                // Alternatively, use the blog description
                // Here we sanitize the provided description for safety
                $site_description = sanitize_text_field(amt_sanitize_description(get_bloginfo('description')));
            }
            // If we have a description, use it in the description meta-tag of the front page
            if (!empty($site_description)) {
                // Note: Contains multipage information through amt_process_paged()
                $metadata_arr[] = '<meta name="description" content="' . esc_attr(amt_process_paged($site_description)) . '" />';
            }
        }
        // Keywords
        if ($do_keywords) {
            // Use the site keywords from the Add-Meta-Tags settings.
            // Fall back to the blog categories.
            $site_keywords = $options["site_keywords"];
            if (empty($site_keywords)) {
                // Alternatively, use the blog categories
                // Here we sanitize the provided keywords for safety
                $site_keywords = sanitize_text_field(amt_sanitize_keywords(amt_get_all_categories()));
            }
            // If we have keywords, use them in the keywords meta-tag of the front page
            if (!empty($site_keywords)) {
                $metadata_arr[] = '<meta name="keywords" content="' . esc_attr($site_keywords) . '" />';
            }
        }
        // Attachments
    } elseif (is_attachment()) {
        // has to be before is_singular() since is_singular() is true for attachments.
        // Description
        if ($do_description) {
            $description = amt_get_content_description($post, $auto = $do_description);
            if (!empty($description)) {
                // Note: Contains multipage information through amt_process_paged()
                $metadata_arr[] = '<meta name="description" content="' . esc_attr(amt_process_paged($description)) . '" />';
            }
        }
        // No keywords
        // Content pages and static pages used as "front page" and "posts page"
        // This also supports products via is_singular()
    } elseif (is_singular() || amt_is_static_front_page() || amt_is_static_home()) {
        // Description
        if ($do_description) {
            $description = amt_get_content_description($post, $auto = $do_description);
            if (!empty($description)) {
                // Note: Contains multipage information through amt_process_paged()
                $metadata_arr[] = '<meta name="description" content="' . esc_attr(amt_process_paged($description)) . '" />';
            }
        }
        // Keywords
        if ($do_keywords) {
            $keywords = amt_get_content_keywords($post, $auto = $do_keywords);
            if (!empty($keywords)) {
                $metadata_arr[] = '<meta name="keywords" content="' . esc_attr($keywords) . '" />';
                // Static Posts Index Page
                // If no keywords have been set in the metabox and this is the static page,
                // which displayes the latest posts, use the categories of the posts in the loop.
            } elseif (amt_is_static_home()) {
                // Here we sanitize the provided keywords for safety
                $cats_from_loop = sanitize_text_field(amt_sanitize_keywords(implode(', ', amt_get_categories_from_loop())));
                if (!empty($cats_from_loop)) {
                    $metadata_arr[] = '<meta name="keywords" content="' . esc_attr($cats_from_loop) . '" />';
                }
            }
        }
        // 'news_keywords'
        $newskeywords = amt_get_post_meta_newskeywords($post->ID);
        if (!empty($newskeywords)) {
//.........这里部分代码省略.........

/**
 * Return an array of Schema.org metatags for the provided $image object.
 * By default, returns metadata for the 'medium' sized version of the image.
 */
function amt_get_jsonld_schemaorg_image_array($options, $image_data, $size = 'medium', $is_representative = false)
{
    //
    // $image_data can be:
    //
    // 1. An array with the following data:
    //
    //    'id'    => null,   // post ID of attachment
    //    'url'   => null,
    //    'width' => null,
    //    'height' => null,
    //    'type'  => null,
    //
    // 2. An attachment ID (integer)
    //
    // 3. An attachment object (post object)    (Usually ths is the case in the schema.org generators
    //
    //var_dump($image_data);
    $metadata_arr = array();
    $image = null;
    if (is_array($image_data) && !is_null($image_data['url'])) {
        // Here we process the image data as retrieved from the special notation of the image's URL.
        // No size information is taken into account in this case.
        // Schema.org type
        $metadata_arr['@type'] = 'ImageObject';
        // Image tags
        $metadata_arr['url'] = esc_url($image_data['url']);
        $metadata_arr['contentUrl'] = esc_url($image_data['url']);
        if (apply_filters('amt_extended_image_tags', true)) {
            if (!is_null($image_data['width'])) {
                $metadata_arr['width'] = esc_attr($image_data['width']);
            }
            if (!is_null($image_data['height'])) {
                $metadata_arr['height'] = esc_attr($image_data['height']);
            }
            if (!is_null($image_data['type'])) {
                $metadata_arr['encodingFormat'] = esc_attr($image_data['type']);
            }
        }
        return $metadata_arr;
    } elseif (is_array($image_data) && is_numeric($image_data['id'])) {
        // The attachment ID exists in the array's 'id' item.
        $image = get_post(absint($image_data['id']));
    } elseif (is_numeric($image_data)) {
        // Image data is the attachment ID (integer)
        $image = get_post(absint($image_data));
    } elseif (is_object($image_data) && isset($image_data->ID)) {
        // Image data is the attachment itself.
        $image = $image_data;
    }
    if (is_null($image) || !is_object($image) || !isset($image->ID)) {
        return $metadata_arr;
    }
    // Process the image attachment and generate meta tags.
    // Schema.org type
    $metadata_arr['@type'] = 'ImageObject';
    // Get the image object <- Already have it
    //$image = get_post( $post_id );
    // Data for image attachments
    $image_meta = wp_get_attachment_metadata($image->ID);
    // contains info about all sizes
    // We use wp_get_attachment_image_src() since it constructs the URLs
    $thumbnail_meta = wp_get_attachment_image_src($image->ID, 'thumbnail');
    $main_size_meta = wp_get_attachment_image_src($image->ID, $size);
    // name (title)
    $metadata_arr['name'] = esc_attr(strip_tags(get_the_title($image->ID)));
    // OLD name (title)
    //$image_title = sanitize_text_field( $image->post_title );
    //if ( ! empty( $image_title ) ) {
    //    $metadata_arr[] = '<meta itemprop="name" content="' . esc_attr( $image_title ) . '" />';
    //}
    // URL (links to image file)
    //$metadata_arr['url'] = esc_url_raw( get_permalink( $image->ID ) );
    $metadata_arr['url'] = esc_url_raw($main_size_meta[0]);
    // sameAS (links to attachment page)
    $metadata_arr['sameAs'] = esc_url_raw(get_permalink($image->ID));
    // Description (generated from $image->post_content. See: amt_get_the_excerpt()
    $image_description = amt_get_content_description($image);
    if (!empty($image_description)) {
        $metadata_arr['description'] = esc_attr($image_description);
    }
    // thumbnail url
    $metadata_arr['thumbnailUrl'] = esc_url_raw($thumbnail_meta[0]);
    // main image
    $metadata_arr['contentUrl'] = esc_url_raw($main_size_meta[0]);
    if (apply_filters('amt_extended_image_tags', true)) {
        $metadata_arr['width'] = esc_attr($main_size_meta[1]);
        $metadata_arr['height'] = esc_attr($main_size_meta[2]);
        $metadata_arr['encodingFormat'] = esc_attr(get_post_mime_type($image->ID));
    }
    // caption
    // Here we sanitize the provided description for safety
    $image_caption = sanitize_text_field($image->post_excerpt);
    if (!empty($image_caption)) {
        $metadata_arr['caption'] = esc_attr($image_caption);
    }
//.........这里部分代码省略.........

/**
 * Generates Opengraph metadata.
 *
 * Currently for:
 * - home page
 * - author archive
 * - content
 */
function amt_add_opengraph_metadata_head($post, $attachments, $embedded_media, $options)
{
    if (apply_filters('amt_exclude_opengraph_metadata', false)) {
        return array();
    }
    $do_auto_opengraph = $options["auto_opengraph"] == "1" ? true : false;
    if (!$do_auto_opengraph) {
        return array();
    }
    $metadata_arr = array();
    // fb:app_id & fb:admins
    // We currently let users add the full meta tags for fb:app_id and fb:admins in the site wide meta tags box.
    // fb:app_id appears everywhere
    //if ( ! empty($options['social_main_facebook_app_id']) ) {
    //    $metadata_arr[] = '<meta property="fb:app_id" content="' . esc_attr( $options['social_main_facebook_app_id'] ) . '" />';
    //}
    // fb:admins appear everywhere
    //if ( ! empty($options['social_main_facebook_admins']) ) {
    //    $fb_admins_arr = explode(',', $options['social_main_facebook_admins']);
    //    foreach ( $fb_admins_arr as $fb_admin ) {
    //        $metadata_arr[] = '<meta property="fb:admins" content="' . esc_attr( trim($fb_admin) ) . '" />';
    //    }
    //}
    // no publisher meta tag for facebook, unless it is content
    // Custom content override
    if (amt_is_custom($post, $options)) {
        // Return metadata with:
        // add_filter( 'amt_custom_metadata_opengraph', 'my_function', 10, 5 );
        // Return an array of meta tags. Array item format: ['key_can_be_whatever'] = '<meta name="foo" content="bar" />'
        $metadata_arr = apply_filters('amt_custom_metadata_opengraph', $metadata_arr, $post, $options, $attachments, $embedded_media);
        // Default front page displaying the latest posts
    } elseif (amt_is_default_front_page()) {
        // Type
        $metadata_arr[] = '<meta property="og:type" content="website" />';
        // Site Name
        $metadata_arr[] = '<meta property="og:site_name" content="' . esc_attr(get_bloginfo('name')) . '" />';
        // Title - Note: Contains multipage information
        $metadata_arr['og:title'] = '<meta property="og:title" content="' . esc_attr(amt_get_title_for_metadata($options, $post)) . '" />';
        // URL - Note: different method to get the permalink on paged archives
        if (is_paged()) {
            $metadata_arr[] = '<meta property="og:url" content="' . esc_url_raw(get_pagenum_link(get_query_var('paged'))) . '" />';
        } else {
            $metadata_arr[] = '<meta property="og:url" content="' . esc_url_raw(trailingslashit(get_bloginfo('url'))) . '" />';
        }
        // Site description - Note: Contains multipage information through amt_process_paged()
        $site_description = amt_get_site_description($options);
        if (empty($site_description)) {
            $site_description = get_bloginfo('description');
        }
        if (!empty($site_description)) {
            $metadata_arr[] = '<meta property="og:description" content="' . esc_attr(amt_process_paged($site_description)) . '" />';
        }
        // Locale
        $metadata_arr[] = '<meta property="og:locale" content="' . esc_attr(str_replace('-', '_', amt_get_language_site($options))) . '" />';
        // Site Image
        // Use the default image, if one has been set.
        $image_data = amt_get_default_image_data();
        if (!empty($image_data)) {
            $image_size = apply_filters('amt_image_size_index', 'full');
            $image_meta_tags = amt_get_opengraph_image_metatags($options, $image_data, $size = $image_size);
            if (!empty($image_meta_tags)) {
                $metadata_arr = array_merge($metadata_arr, $image_meta_tags);
            }
        }
        // Front page using a static page
        // Note: might also contain a listing of posts which may be paged, so use amt_process_paged()
    } elseif (amt_is_static_front_page()) {
        // Type
        if ($options['author_profile_source'] == 'frontpage') {
            // The front page is treated as the profile page.
            $metadata_arr[] = '<meta property="og:type" content="profile" />';
        } else {
            $metadata_arr[] = '<meta property="og:type" content="website" />';
        }
        // Site Name
        $metadata_arr[] = '<meta property="og:site_name" content="' . esc_attr(get_bloginfo('name')) . '" />';
        // Title - Note: Contains multipage information
        $metadata_arr['og:title'] = '<meta property="og:title" content="' . esc_attr(amt_get_title_for_metadata($options, $post)) . '" />';
        // URL - Note: different method to get the permalink on paged archives
        if (is_paged()) {
            $metadata_arr[] = '<meta property="og:url" content="' . esc_url_raw(get_pagenum_link(get_query_var('paged'))) . '" />';
        } else {
            $metadata_arr[] = '<meta property="og:url" content="' . esc_url_raw(trailingslashit(get_bloginfo('url'))) . '" />';
        }
        // Site Description - Note: Contains multipage information through amt_process_paged()
        $content_desc = amt_get_content_description($post);
        if (!empty($content_desc)) {
            // Use the pages custom description
            $metadata_arr[] = '<meta property="og:description" content="' . esc_attr(amt_process_paged($content_desc)) . '" />';
        } elseif (get_bloginfo('description')) {
            // Alternatively use the blog's description
            $metadata_arr[] = '<meta property="og:description" content="' . esc_attr(amt_process_paged(get_bloginfo('description'))) . '" />';
//.........这里部分代码省略.........

//.........这里部分代码省略.........
            // Fall back to the blog description.
            $site_description = amt_get_site_description($options);
            if (empty($site_description)) {
                // Alternatively, use the blog description
                // Here we sanitize the provided description for safety
                $site_description = sanitize_text_field(amt_sanitize_description(get_bloginfo('description')));
            }
            // If we have a description, use it in the description meta-tag of the front page
            if (!empty($site_description)) {
                // Note: Contains multipage information through amt_process_paged()
                $metadata_arr['basic:description'] = '<meta name="description" content="' . esc_attr(amt_process_paged($site_description)) . '" />';
            }
        }
        // Keywords
        if ($do_keywords) {
            // Use the site keywords from the Add-Meta-Tags settings.
            // Fall back to the blog categories.
            $site_keywords = amt_get_site_keywords($options);
            if (empty($site_keywords)) {
                // Alternatively, use the blog categories
                // Here we sanitize the provided keywords for safety
                $site_keywords = sanitize_text_field(amt_sanitize_keywords(amt_get_all_categories()));
            }
            // If we have keywords, use them in the keywords meta-tag of the front page
            if (!empty($site_keywords)) {
                $metadata_arr['basic:keywords'] = '<meta name="keywords" content="' . esc_attr($site_keywords) . '" />';
            }
        }
        // Attachments
    } elseif (is_attachment()) {
        // has to be before is_singular() since is_singular() is true for attachments.
        // Description
        if ($do_description) {
            $description = amt_get_content_description($post, $auto = $do_description);
            if (!empty($description)) {
                // Note: Contains multipage information through amt_process_paged()
                $metadata_arr['basic:description'] = '<meta name="description" content="' . esc_attr(amt_process_paged($description)) . '" />';
            }
        }
        // No keywords
        // Content pages and static pages used as "front page" and "posts page"
        // This also supports products via is_singular()
    } elseif (is_singular() || amt_is_static_front_page() || amt_is_static_home()) {
        // Description
        if ($do_description) {
            $description = amt_get_content_description($post, $auto = $do_description);
            if (!empty($description)) {
                // Note: Contains multipage information through amt_process_paged()
                $metadata_arr['basic:description'] = '<meta name="description" content="' . esc_attr(amt_process_paged($description)) . '" />';
            }
        }
        // Keywords
        if ($do_keywords) {
            $keywords = amt_get_content_keywords($post, $auto = $do_keywords);
            if (!empty($keywords)) {
                $metadata_arr['basic:keywords'] = '<meta name="keywords" content="' . esc_attr($keywords) . '" />';
                // Static Posts Index Page
                // If no keywords have been set in the metabox and this is the static page,
                // which displayes the latest posts, use the categories of the posts in the loop.
            } elseif (amt_is_static_home()) {
                // Here we sanitize the provided keywords for safety
                $cats_from_loop = sanitize_text_field(amt_sanitize_keywords(implode(', ', amt_get_categories_from_loop())));
                if (!empty($cats_from_loop)) {
                    $metadata_arr['basic:keywords'] = '<meta name="keywords" content="' . esc_attr($cats_from_loop) . '" />';
                }
            }

//.........这里部分代码省略.........
                if (!empty($posttype_image_url)) {
                    $image_data = amt_get_image_data($posttype_image_url);
                    if (!empty($image_data)) {
                        $image_size = apply_filters('amt_image_size_index', 'full');
                        $image_meta_tags = amt_get_twitter_cards_image_metatags($options, $image_data, $size = $image_size);
                        if (!empty($image_meta_tags)) {
                            $metadata_arr = array_merge($metadata_arr, $image_meta_tags);
                        }
                    }
                    //$metadata_arr[] = '<meta name="twitter:image" content="' . esc_url_raw( $posttype_image_url ) . '" />';
                }
            }
        }
        return $metadata_arr;
    }
    // Further check (required in some reported cases)
    // Go no further if the content type does not validate is_singular().
    if (!is_singular()) {
        return array();
    }
    // Products
    // A 'product' Twitter Card is generated. See: https://dev.twitter.com/cards/types/product
    if (amt_is_product()) {
        // Type
        $metadata_arr[] = '<meta name="twitter:card" content="product" />';
        // Author and Publisher
        $metadata_arr = array_merge($metadata_arr, amt_get_twitter_cards_author_publisher_metatags($options, $post));
        // Title
        // Note: Contains multipage information
        //$metadata_arr[] = '<meta name="twitter:title" content="' . esc_attr( amt_process_paged( strip_tags( get_the_title($post->ID) ) ) ) . '" />';
        $metadata_arr['twitter:title'] = '<meta name="twitter:title" content="' . esc_attr(amt_get_title_for_metadata($options, $post)) . '" />';
        // Description - We use the description defined by Add-Meta-Tags
        // Note: Contains multipage information through amt_process_paged()
        $content_desc = amt_get_content_description($post);
        if (!empty($content_desc)) {
            $metadata_arr[] = '<meta name="twitter:description" content="' . esc_attr(amt_process_paged($content_desc)) . '" />';
        }
        // Image
        // Use the featured image or the default image as a fallback.
        // Set to true if image meta tags have been added to the card, so that it does not
        // search for any more images.
        $image_metatags_added = false;
        // First check if a global image override URL has been entered.
        // If yes, use this image URL and override all other images.
        $image_data = amt_get_image_data(amt_get_post_meta_image_url($post->ID));
        if (!empty($image_data)) {
            $image_size = apply_filters('amt_image_size_product', 'full');
            $image_meta_tags = amt_get_twitter_cards_image_metatags($options, $image_data, $size = $image_size);
            if (!empty($image_meta_tags)) {
                $metadata_arr = array_merge($metadata_arr, $image_meta_tags);
            }
            //$global_image_override_url = amt_get_post_meta_image_url($post->ID);
            //if ( $image_metatags_added === false && ! empty( $global_image_override_url ) ) {
            //    $metadata_arr[] = '<meta name="twitter:image" content="' . esc_url_raw( $global_image_override_url ) . '" />';
            // Images have been found.
            $image_metatags_added = true;
        }
        // Set the image size to use
        $image_size = apply_filters('amt_image_size_product', 'full');
        // If the content has a featured image, then we use it.
        if ($image_metatags_added === false && function_exists('has_post_thumbnail') && has_post_thumbnail($post->ID)) {
            $main_size_meta = wp_get_attachment_image_src(get_post_thumbnail_id($post->ID), $image_size);
            $metadata_arr[] = '<meta name="twitter:image" content="' . esc_url_raw($main_size_meta[0]) . '" />';
            if (apply_filters('amt_extended_image_tags', true)) {
                $metadata_arr[] = '<meta name="twitter:image:width" content="' . esc_attr($main_size_meta[1]) . '" />';
                $metadata_arr[] = '<meta name="twitter:image:height" content="' . esc_attr($main_size_meta[2]) . '" />';

function amt_add_dublin_core_metadata_head($post, $attachments, $embedded_media, $options)
{
    if (apply_filters('amt_exclude_dublin_core_metadata', false)) {
        return array();
    }
    $metadata_arr = array();
    $do_auto_dublincore = $options["auto_dublincore"] == "1" ? true : false;
    if (!$do_auto_dublincore) {
        return $metadata_arr;
    }
    // Custom content override
    if (amt_is_custom($post, $options)) {
        // Return metadata with:
        // add_filter( 'amt_custom_metadata_dublin_core', 'my_function', 10, 5 );
        // Return an array of meta tags. Array item format: ['key_can_be_whatever'] = '<meta name="foo" content="bar" />'
        $metadata_arr = apply_filters('amt_custom_metadata_dublin_core', $metadata_arr, $post, $options, $attachments, $embedded_media);
        return $metadata_arr;
    }
    if (!is_singular() || is_front_page()) {
        // is_front_page() is used for the case in which a static page is used as the front page.
        // Dublin Core metadata has a meaning for content only.
        return array();
    }
    // The Dublin Core metadata generator does not support products or product groups.
    if (amt_is_product() || amt_is_product_group()) {
        return array();
    }
    // Title
    // Note: Contains multipage information through amt_process_paged()
    $metadata_arr['dcterms.title'] = '<meta name="dcterms.title" content="' . esc_attr(amt_get_title_for_metadata($options, $post)) . '" />';
    // Resource identifier - Uses amt_get_permalink_for_multipage()
    $metadata_arr[] = '<meta name="dcterms.identifier" content="' . esc_url_raw(amt_get_permalink_for_multipage($post)) . '" />';
    $metadata_arr[] = '<meta name="dcterms.creator" content="' . esc_attr(amt_get_dublin_core_author_notation($post)) . '" />';
    //$metadata_arr[] = '<meta name="dcterms.date" content="' . esc_attr( amt_iso8601_date($post->post_date) ) . '" />';
    $metadata_arr[] = '<meta name="dcterms.created" content="' . esc_attr(amt_iso8601_date($post->post_date)) . '" />';
    $metadata_arr[] = '<meta name="dcterms.available" content="' . esc_attr(amt_iso8601_date($post->post_date)) . '" />';
    //$metadata_arr[] = '<meta name="dcterms.issued" content="' . esc_attr( amt_iso8601_date($post->post_date) ) . '" />';
    $metadata_arr[] = '<meta name="dcterms.modified" content="' . esc_attr(amt_iso8601_date($post->post_modified)) . '" />';
    // Description
    // We use the same description as the ``description`` meta tag.
    // Note: Contains multipage information through amt_process_paged()
    $content_desc = amt_get_content_description($post);
    if (!empty($content_desc)) {
        $metadata_arr[] = '<meta name="dcterms.description" content="' . esc_attr(amt_process_paged($content_desc)) . '" />';
    }
    // Keywords
    if (!is_attachment()) {
        // Attachments do not support keywords
        // dcterms.subject - one for each keyword.
        $keywords = explode(',', amt_get_content_keywords($post));
        foreach ($keywords as $subject) {
            $subject = trim($subject);
            if (!empty($subject)) {
                $metadata_arr[] = '<meta name="dcterms.subject" content="' . esc_attr($subject) . '" />';
            }
        }
    }
    $metadata_arr[] = '<meta name="dcterms.language" content="' . esc_attr(amt_get_language_content($options, $post)) . '" />';
    $metadata_arr[] = '<meta name="dcterms.publisher" content="' . esc_url_raw(trailingslashit(get_bloginfo('url'))) . '" />';
    // Copyright page
    $copyright_url = amt_get_site_copyright_url($options);
    if (empty($copyright_url)) {
        $copyright_url = trailingslashit(get_bloginfo('url'));
    }
    if (!empty($copyright_url)) {
        $metadata_arr[] = '<meta name="dcterms.rights" content="' . esc_url_raw($copyright_url) . '" />';
    }
    // License
    $license_url = '';
    // The following requires creative commons configurator
    if (function_exists('bccl_get_license_url')) {
        $license_url = bccl_get_license_url();
    }
    // Allow filtering of the license URL
    $license_url = apply_filters('amt_dublin_core_license', $license_url, $post->ID);
    // Add metatag if $license_url is not empty.
    if (!empty($license_url)) {
        $metadata_arr[] = '<meta name="dcterms.license" content="' . esc_url_raw($license_url) . '" />';
    }
    // Coverage
    $metadata_arr[] = '<meta name="dcterms.coverage" content="World" />';
    if (is_attachment()) {
        $mime_type = get_post_mime_type($post->ID);
        //$attachment_type = strstr( $mime_type, '/', true );
        // See why we do not use strstr(): http://www.codetrax.org/issues/1091
        $attachment_type = preg_replace('#\\/[^\\/]*$#', '', $mime_type);
        $metadata_arr[] = '<meta name="dcterms.isPartOf" content="' . esc_url_raw(get_permalink($post->post_parent)) . '" />';
        if ('image' == $attachment_type) {
            $metadata_arr[] = '<meta name="dcterms.type" content="Image" />';
            $metadata_arr[] = '<meta name="dcterms.format" content="' . $mime_type . '" />';
        } elseif ('video' == $attachment_type) {
            $metadata_arr[] = '<meta name="dcterms.type" content="MovingImage" />';
            $metadata_arr[] = '<meta name="dcterms.format" content="' . $mime_type . '" />';
        } elseif ('audio' == $attachment_type) {
            $metadata_arr[] = '<meta name="dcterms.type" content="Sound" />';
            $metadata_arr[] = '<meta name="dcterms.format" content="' . $mime_type . '" />';
        }
        // Finally add the hasFormat
        $metadata_arr[] = '<meta name="dcterms.hasFormat" content="' . esc_url_raw(wp_get_attachment_url($post->ID)) . '" />';
    } else {
//.........这里部分代码省略.........

/**
 * Return an array of Schema.org metatags for the provided $image object.
 * By default, returns metadata for the 'medium' sized version of the image.
 */
function amt_get_jsonld_schemaorg_image_array($image, $size = 'medium', $is_representative = false)
{
    $metadata_arr = array();
    // Schema.org type
    $metadata_arr['@type'] = 'ImageObject';
    // Get the image object <- Already have it
    //$image = get_post( $post_id );
    // Data for image attachments
    $image_meta = wp_get_attachment_metadata($image->ID);
    // contains info about all sizes
    // We use wp_get_attachment_image_src() since it constructs the URLs
    $thumbnail_meta = wp_get_attachment_image_src($image->ID, 'thumbnail');
    $main_size_meta = wp_get_attachment_image_src($image->ID, $size);
    // name (title)
    $metadata_arr['name'] = esc_attr(get_the_title($image->ID));
    // OLD name (title)
    //$image_title = sanitize_text_field( $image->post_title );
    //if ( ! empty( $image_title ) ) {
    //    $metadata_arr[] = '<meta itemprop="name" content="' . esc_attr( $image_title ) . '" />';
    //}
    // URL (links to attachment page)
    $metadata_arr['url'] = esc_url_raw(get_permalink($image->ID));
    // Description (generated from $image->post_content. See: amt_get_the_excerpt()
    $image_description = amt_get_content_description($image);
    if (!empty($image_description)) {
        $metadata_arr['description'] = esc_attr($image_description);
    }
    // thumbnail url
    $metadata_arr['thumbnailUrl'] = esc_url_raw($thumbnail_meta[0]);
    // main image
    $metadata_arr['contentUrl'] = esc_url_raw($main_size_meta[0]);
    if (apply_filters('amt_extended_image_tags', true)) {
        $metadata_arr['width'] = esc_attr($main_size_meta[1]);
        $metadata_arr['height'] = esc_attr($main_size_meta[2]);
        $metadata_arr['encodingFormat'] = esc_attr(get_post_mime_type($image->ID));
    }
    // caption
    // Here we sanitize the provided description for safety
    $image_caption = sanitize_text_field($image->post_excerpt);
    if (!empty($image_caption)) {
        $metadata_arr['caption'] = esc_attr($image_caption);
    }
    // alt
    // Here we sanitize the provided description for safety
    $image_alt = sanitize_text_field(get_post_meta($image->ID, '_wp_attachment_image_alt', true));
    if (!empty($image_alt)) {
        $metadata_arr['text'] = esc_attr($image_alt);
    }
    if ($is_representative === true) {
        // representativeOfPage - Boolean - Indicates whether this image is representative of the content of the page.
        $metadata_arr['representativeOfPage'] = 'True';
    }
    return $metadata_arr;
}