PHP Jetpack_PostImages::from_thumbnail方法代码示例

function enhanced_og_has_featured_image($post_id)
{
    $featured = Jetpack_PostImages::from_thumbnail($post_id, 200, 200);
    if (!empty($featured) && count($featured) > 0) {
        return true;
    }
    return false;
}

 static function twitter_cards_tags($og_tags)
 {
     global $post;
     if (post_password_required()) {
         return $og_tags;
     }
     if (apply_filters('jetpack_disable_twitter_cards', false)) {
         return $og_tags;
     }
     /*
      * These tags apply to any page (home, archives, etc)
      */
     $site_tag = apply_filters('jetpack_twitter_cards_site_tag', self::site_tag());
     $og_tags['twitter:site'] = self::sanitize_twitter_user($site_tag);
     if (!is_singular() || !empty($og_tags['twitter:card'])) {
         return $og_tags;
     }
     /*
      * The following tags only apply to single pages.
      */
     $card_type = 'summary';
     // Try to give priority to featured images
     if (class_exists('Jetpack_PostImages')) {
         $featured = Jetpack_PostImages::from_thumbnail($post->ID, 240, 240);
         if (!empty($featured) && count($featured) > 0) {
             if ((int) $featured[0]['src_width'] >= 280 && (int) $featured[0]['src_height'] >= 150) {
                 $card_type = 'summary_large_image';
                 $og_tags['twitter:image:src'] = add_query_arg('w', 640, $featured[0]['src']);
             } else {
                 $og_tags['twitter:image'] = add_query_arg('w', 240, $featured[0]['src']);
             }
         }
     }
     // Only proceed with media analysis if a featured image has not superseded it already.
     if (empty($og_tags['twitter:image']) && empty($og_tags['twitter:image:src'])) {
         if (!class_exists('Jetpack_Media_Summary') && defined('IS_WPCOM') && IS_WPCOM) {
             include WP_CONTENT_DIR . '/lib/class.wpcom-media-summary.php';
         }
         // Test again, class should already be auto-loaded in Jetpack.
         // If not, skip extra media analysis and stick with a summary card
         if (class_exists('Jetpack_Media_Summary')) {
             $extract = Jetpack_Media_Summary::get($post->ID);
             if ('gallery' == $extract['type']) {
                 list($og_tags, $card_type) = self::twitter_cards_define_type_based_on_image_count($og_tags, $extract);
             } else {
                 if ('video' == $extract['type']) {
                     // Leave as summary, but with large pict of poster frame (we know those comply to Twitter's size requirements)
                     $card_type = 'summary_large_image';
                     $og_tags['twitter:image:src'] = add_query_arg('w', 640, $extract['image']);
                 } else {
                     list($og_tags, $card_type) = self::twitter_cards_define_type_based_on_image_count($og_tags, $extract);
                 }
             }
         }
     }
     $og_tags['twitter:card'] = $card_type;
     // If we have information on the author/creator, then include that as well
     if (!empty($post) && !empty($post->post_author)) {
         $handle = apply_filters('jetpack_sharing_twitter_via', '', $post->ID);
         if (!empty($handle) && 'wordpressdotcom' != $handle && 'jetpack' != $handle) {
             $og_tags['twitter:creator'] = self::sanitize_twitter_user($handle);
         }
     }
     // Make sure we have a description for Twitter, their validator isn't happy without some content (single space not valid).
     if (!isset($og_tags['og:description']) || '' == trim($og_tags['og:description']) || __('Visit the post for more.', 'jetpack') == $og_tags['og:description']) {
         // empty( trim( $og_tags['og:description'] ) ) isn't valid php
         $has_creator = !empty($og_tags['twitter:creator']) && '@wordpressdotcom' != $og_tags['twitter:creator'] ? true : false;
         if ('photo' == $card_type) {
             $og_tags['twitter:description'] = $has_creator ? sprintf(__('Photo post by %s.', 'jetpack'), $og_tags['twitter:creator']) : __('Photo post.', 'jetpack');
         } else {
             if (!empty($extract) && 'video' == $extract['type']) {
                 // use $extract['type'] since $card_type is 'summary' for video posts
                 $og_tags['twitter:description'] = $has_creator ? sprintf(__('Video post by %s.', 'jetpack'), $og_tags['twitter:creator']) : __('Video post.', 'jetpack');
             } else {
                 if ('gallery' == $card_type) {
                     $og_tags['twitter:description'] = $has_creator ? sprintf(__('Gallery post by %s.', 'jetpack'), $og_tags['twitter:creator']) : __('Gallery post.', 'jetpack');
                 } else {
                     $og_tags['twitter:description'] = $has_creator ? sprintf(__('Post by %s.', 'jetpack'), $og_tags['twitter:creator']) : __('Visit the post for more.', 'jetpack');
                 }
             }
         }
     }
     return $og_tags;
 }

 /**
  * @param $post A post object
  * @param $args (array) Optional args, see defaults list for details
  * @returns array Returns an array of all images meeting the specified criteria in $args
  *
  * Uses Jetpack Post Images
  */
 private static function get_image_fields($post, $args = array())
 {
     $defaults = array('width' => 200, 'height' => 200);
     $args = wp_parse_args($args, $defaults);
     $image_list = array();
     $image_booleans = array();
     $image_booleans['gallery'] = 0;
     $from_featured_image = Jetpack_PostImages::from_thumbnail($post->ID, $args['width'], $args['height']);
     if (!empty($from_featured_image)) {
         $srcs = wp_list_pluck($from_featured_image, 'src');
         $image_list = array_merge($image_list, $srcs);
     }
     $from_slideshow = Jetpack_PostImages::from_slideshow($post->ID, $args['width'], $args['height']);
     if (!empty($from_slideshow)) {
         $srcs = wp_list_pluck($from_slideshow, 'src');
         $image_list = array_merge($image_list, $srcs);
     }
     $from_gallery = Jetpack_PostImages::from_gallery($post->ID);
     if (!empty($from_gallery)) {
         $srcs = wp_list_pluck($from_gallery, 'src');
         $image_list = array_merge($image_list, $srcs);
         $image_booleans['gallery']++;
         // @todo This count isn't correct, will only every count 1
     }
     // @todo Can we check width/height of these efficiently?  Could maybe use query args at least, before we strip them out
     $image_list = Jetpack_Media_Meta_Extractor::get_images_from_html($post->post_content, $image_list);
     return Jetpack_Media_Meta_Extractor::build_image_struct($image_list);
 }