我正在从前端的表单一次添加大量自定义元数据。
$youtube = \'a:5:{s:10:"video_type";s:7:"youtube";s:16:"videopress_group";a:1:{i:0;a:5:{s:22:"videopress_youtube_url";s:43:"https://www.youtube.com/watch?v=dQw4w9WgXcQ";s:23:"videopress_external_url";s:43:"https://www.youtube.com/watch?v=dQw4w9WgXcQ";s:17:"videopress_upload";s:0:"";s:16:"videopress_embed";s:1:"0";s:19:"videopress_download";s:1:"0";}}s:13:"youtube_group";a:1:{i:0;a:3:{s:19:"youtube_youtube_url";s:43:"https://www.youtube.com/watch?v=Ws82rXrjBOI";s:16:"youtube_controls";s:1:"1";s:17:"youtube_suggested";s:1:"1";}}s:11:"vimeo_group";a:1:{i:0;a:4:{s:8:"vimeo_id";s:8:"";s:14:"vimeo_portrait";s:1:"1";s:11:"vimeo_title";s:1:"1";s:12:"vimeo_byline";s:1:"1";}}s:12:"twitch_group";a:1:{i:0;a:2:{s:10:"twitch_url";s:34:"";s:18:"twitch_stream_from";s:10:"2016-08-03";}}}\';
update_post_meta($pid, \'video_options\', $youtube, false);
但在数据库中，它显示为：
s:810:"a:5:{s:10:"video_type";s:7:"youtube";s:16:"videopress_group";a:1:{i:0;a:5:{s:22:"videopress_youtube_url";s:43:"https://www.youtube.com/watch?v=dQw4w9WgXcQ";s:23:"videopress_external_url";s:43:"https://www.youtube.com/watch?v=dQw4w9WgXcQ";s:17:"videopress_upload";s:0:"";s:16:"videopress_embed";s:1:"0";s:19:"videopress_download";s:1:"0";}}s:13:"youtube_group";a:1:{i:0;a:3:{s:19:"youtube_youtube_url";s:43:"https://www.youtube.com/watch?v=Ws82rXrjBOI";s:16:"youtube_controls";s:1:"1";s:17:"youtube_suggested";s:1:"1";}}s:11:"vimeo_group";a:1:{i:0;a:4:{s:8:"vimeo_id";s:8:"77091919";s:14:"vimeo_portrait";s:1:"1";s:11:"vimeo_title";s:1:"1";s:12:"vimeo_byline";s:1:"1";}}s:12:"twitch_group";a:1:{i:0;a:2:{s:10:"twitch_url";s:34:"http://www.twitch.tv/kinggothalion";s:18:"twitch_stream_from";s:10:"2016-08-03";}}}";
S:810：“从哪里来？”？
