public static function get($post_id)
 {
     self::$post_id = $post_id;
     $gallery = get_post_meta($post_id, '_gallery', true);
     if (!$gallery) {
         return;
     }
     if (is_string($gallery)) {
         $gallery = self::parse_shortcode($gallery);
     }
     foreach ($gallery as $key => $item) {
         if (!is_numeric($item)) {
             unset($gallery[$key]);
         }
     }
     return $gallery;
 }
 public static function get($post_id)
 {
     self::$post_id = $post_id;
     $gallery = get_post_meta($post_id, '_gallery', true);
     if (!$gallery) {
         return;
     }
     if (is_string($gallery)) {
         $gallery = self::parse_shortcode($gallery);
     }
     return $gallery;
 }