Как WordPress хранит вложения в БД (картинки или файлы)
При загрузке картинки WP добавляет данные в таблицу wp_posts - там все стандартно:
global $wpdb;
$po = $wpdb->get_row( "SELECT * from $wpdb->posts where ID = 1821" );
print_r( $po );
/*
stdClass Object
(
[ID] => 1821
[post_author] => 1
[post_date] => 2020-03-08 22:55:32
[post_date_gmt] => 2020-03-08 17:55:32
[post_content] =>
[post_title] => sredyaya-kartinka-e1583064965160
[post_excerpt] =>
[post_status] => inherit
[comment_status] => open
[ping_status] => closed
[post_password] =>
[post_name] => sredyaya-kartinka-e1583064965160
[to_ping] =>
[pinged] =>
[post_modified] => 2020-03-08 22:55:32
[post_modified_gmt] => 2020-03-08 17:55:32
[post_content_filtered] =>
[post_parent] => 5
[guid] => http://wptest.ru/wp-content/uploads/2020/03/sredyaya-kartinka-e1583064965160.jpg
[menu_order] => 0
[post_type] => attachment
[post_mime_type] => image/jpeg
[comment_count] => 0
)
*/
Также добавляет метаданные - этот момент подробнее показан ниже.
Пример с ресайзом (WP 5.3)
Пример когда изображение было загружено и отредактировано в редакторе (было сделано кадрирование).
После этого измененная картинка полностью заменяет оригинал. Оригинал (файл) при этом не удаляется, а единственное упоминание о нём сохраняется в метаполе _wp_attachment_backup_sizes.
$attach_id = 1821;
echo 'wp_get_original_image_url(): '. wp_get_original_image_url( $attach_id )."\n";
echo 'wp_get_original_image_path(): '. wp_get_original_image_path( $attach_id )."\n";
echo 'get_attached_file(): '. get_attached_file( $attach_id )."\n";
echo "\npost_meta -------------\n";
print_r( get_post_meta( $attach_id ) );
echo "\nwp_get_attachment_metadata -------------\n";
print_r( wp_get_attachment_metadata( $attach_id ) );
echo "\n_wp_attachment_backup_sizes -------------\n";
print_r( get_post_meta( $attach_id, '_wp_attachment_backup_sizes', true ) );
/*
wp_get_original_image_url(): http://wptest.ru/wp-content/uploads/2020/03/sredyaya-kartinka-e1583064965160.jpg
wp_get_original_image_path(): C:\sites\wptest.ru\www/wp-content/uploads/2020/03/sredyaya-kartinka-e1583064965160.jpg
get_attached_file(): C:\sites\wptest.ru\www/wp-content/uploads/2020/03/sredyaya-kartinka-e1583064965160.jpg
post_meta -------------
Array
(
[_wp_attached_file] => Array
(
[0] => 2020/03/sredyaya-kartinka-e1583064965160.jpg
)
[_wp_attachment_metadata] => Array
(
[0] => a:5:{s:5:"width";i:672;s:6:"height";i:422;s:4:"file";s:44:"2020/03/sredyaya-kartinka-e1583064965160.jpg";
s:5:"sizes";a:4:{s:6:"medium";a:4:{s:4:"file";s:44:"sredyaya-kartinka-e1583064965160-300x188.jpg";
s:5:"width";i:300;s:6:"height";i:188;s:9:"mime-type";s:10:"image/jpeg";}
s:5:"large";a:4:{s:4:"file";s:30:"sredyaya-kartinka-1024x576.jpg";s:5:"width";i:1024;s:6:"height";
i:576;s:9:"mime-type";s:10:"image/jpeg";}s:9:"thumbnail";a:4:{s:4:"file";s:44:"sredyaya-kartinka-e1583064965160-150x150.jpg";
s:5:"width";i:150;s:6:"height";i:150;s:9:"mime-type";s:10:"image/jpeg";}
s:12:"medium_large";a:4:{s:4:"file";s:29:"sredyaya-kartinka-768x432.jpg";s:5:"width";i:768;
s:6:"height";i:432;s:9:"mime-type";s:10:"image/jpeg";}}s:10:"image_meta";
a:12:{s:8:"aperture";s:1:"0";s:6:"credit";s:0:"";s:6:"camera";s:0:"";s:7:"caption";s:0:"";s:17:"created_timestamp";s:1:"0";
s:9:"copyright";s:0:"";s:12:"focal_length";s:1:"0";s:3:"iso";s:1:"0";s:13:"shutter_speed";s:1:"0";s:5:"title";
s:0:"";s:11:"orientation";s:1:"0";s:8:"keywords";a:0:{}}}
)
[_edit_lock] => Array
(
[0] => 1583080079:1
)
[_edit_last] => Array
(
[0] => 1
)
[_wp_attachment_backup_sizes] => Array
(
[0] => a:5:{s:9:"full-orig";a:3:{s:5:"width";i:1280;s:6:"height";i:720;s:4:"file";s:21:"sredyaya-kartinka.jpg";}
s:14:"thumbnail-orig";a:4:{s:4:"file";s:29:"sredyaya-kartinka-150x150.jpg";
s:5:"width";i:150;s:6:"height";i:150;s:9:"mime-type";s:10:"image/jpeg";}s:11:"medium-orig";
a:4:{s:4:"file";s:29:"sredyaya-kartinka-300x169.jpg";s:5:"width";i:300;s:6:"height";i:169;s:9:"mime-type";s:10:"image/jpeg";}
s:17:"medium_large-orig";a:4:{s:4:"file";s:29:"sredyaya-kartinka-768x432.jpg";s:5:"width";i:768;
s:6:"height";i:432;s:9:"mime-type";s:10:"image/jpeg";}s:10:"large-orig";a:4:{s:4:"file";
s:30:"sredyaya-kartinka-1024x576.jpg";s:5:"width";i:1024;s:6:"height";i:576;s:9:"mime-type";s:10:"image/jpeg";}}
)
)
wp_get_attachment_metadata -------------
Array
(
[width] => 672
[height] => 422
[file] => 2020/03/sredyaya-kartinka-e1583064965160.jpg
[sizes] => Array
(
[medium] => Array
(
[file] => sredyaya-kartinka-e1583064965160-300x188.jpg
[width] => 300
[height] => 188
[mime-type] => image/jpeg
)
[large] => Array
(
[file] => sredyaya-kartinka-1024x576.jpg
[width] => 1024
[height] => 576
[mime-type] => image/jpeg
)
[thumbnail] => Array
(
[file] => sredyaya-kartinka-e1583064965160-150x150.jpg
[width] => 150
[height] => 150
[mime-type] => image/jpeg
)
[medium_large] => Array
(
[file] => sredyaya-kartinka-768x432.jpg
[width] => 768
[height] => 432
[mime-type] => image/jpeg
)
)
[image_meta] => Array
(
[aperture] => 0
[credit] =>
[camera] =>
=>
[created_timestamp] => 0
[copyright] =>
[focal_length] => 0
[iso] => 0
[shutter_speed] => 0
[title] =>
[orientation] => 0
[keywords] => Array
(
)
)
)
_wp_attachment_backup_sizes -------------
Array
(
[full-orig] => Array
(
[width] => 1280
[height] => 720
[file] => sredyaya-kartinka.jpg
)
[thumbnail-orig] => Array
(
[file] => sredyaya-kartinka-150x150.jpg
[width] => 150
[height] => 150
[mime-type] => image/jpeg
)
[medium-orig] => Array
(
[file] => sredyaya-kartinka-300x169.jpg
[width] => 300
[height] => 169
[mime-type] => image/jpeg
)
[medium_large-orig] => Array
(
[file] => sredyaya-kartinka-768x432.jpg
[width] => 768
[height] => 432
[mime-type] => image/jpeg
)
[large-orig] => Array
(
[file] => sredyaya-kartinka-1024x576.jpg
[width] => 1024
[height] => 576
[mime-type] => image/jpeg
)
)
*/
Пример с большой фоткой (WP 5.3)
Просто загружена большая фотка с которой создались все возможные размеры.
/*
wp_get_original_image_url(): http://wptest.ru/wp-content/uploads/2020/03/jpg-big-image.jpeg
wp_get_original_image_path(): C:\sites\wptest.ru\www/wp-content/uploads/2020/03/jpg-big-image.jpeg
get_attached_file(): C:\sites\wptest.ru\www/wp-content/uploads/2020/03/jpg-big-image-scaled.jpeg
post_meta -------------
Array
(
[_wp_attached_file] => Array
(
[0] => 2020/03/jpg-big-image-scaled.jpeg
)
[_wp_attachment_metadata] => Array
(
[0] => a:6:{s:5:"width";i:2560;s:6:"height";i:1707;s:4:"file";s:33:"2020/03/jpg-big-image-scaled.jpeg";s:5:"sizes";
a:6:{s:6:"medium";a:4:{s:4:"file";s:26:"jpg-big-image-300x200.jpeg";s:5:"width";i:300;s:6:"height";i:200;s:9:"mime-type";s:10:"image/jpeg";}
s:5:"large";a:4:{s:4:"file";s:27:"jpg-big-image-1024x683.jpeg";s:5:"width";i:1024;s:6:"height";i:683;s:9:"mime-type";s:10:"image/jpeg";}
s:9:"thumbnail";a:4:{s:4:"file";s:26:"jpg-big-image-150x150.jpeg";s:5:"width";i:150;s:6:"height";i:150;s:9:"mime-type";s:10:"image/jpeg";}
s:12:"medium_large";a:4:{s:4:"file";s:26:"jpg-big-image-768x512.jpeg";s:5:"width";i:768;s:6:"height";i:512;s:9:"mime-type";s:10:"image/jpeg";}
s:9:"1536x1536";a:4:{s:4:"file";s:28:"jpg-big-image-1536x1024.jpeg";s:5:"width";i:1536;s:6:"height";i:1024;s:9:"mime-type";s:10:"image/jpeg";}
s:9:"2048x2048";a:4:{s:4:"file";s:28:"jpg-big-image-2048x1365.jpeg";s:5:"width";i:2048;s:6:"height";i:1365;s:9:"mime-type";s:10:"image/jpeg";}}
s:10:"image_meta";a:12:{s:8:"aperture";s:2:"11";s:6:"credit";s:0:"";s:6:"camera";s:11:"NIKON D5300";s:7:"caption";s:0:"";s:17:"created_timestamp";
s:10:"1413130422";s:9:"copyright";s:0:"";s:12:"focal_length";s:2:"31";s:3:"iso";s:3:"320";s:13:"shutter_speed";s:5:"0.002";s:5:"title";s:0:"";s:11:"orientation";
s:1:"1";s:8:"keywords";a:0:{}}s:14:"original_image";s:18:"jpg-big-image.jpeg";}
)
[_edit_lock] => Array
(
[0] => 1583088196:1
)
)
wp_get_attachment_metadata -------------
Array
(
[width] => 2560
[height] => 1707
[file] => 2020/03/jpg-big-image-scaled.jpeg
[sizes] => Array
(
[medium] => Array
(
[file] => jpg-big-image-300x200.jpeg
[width] => 300
[height] => 200
[mime-type] => image/jpeg
)
[large] => Array
(
[file] => jpg-big-image-1024x683.jpeg
[width] => 1024
[height] => 683
[mime-type] => image/jpeg
)
[thumbnail] => Array
(
[file] => jpg-big-image-150x150.jpeg
[width] => 150
[height] => 150
[mime-type] => image/jpeg
)
[medium_large] => Array
(
[file] => jpg-big-image-768x512.jpeg
[width] => 768
[height] => 512
[mime-type] => image/jpeg
)
[1536x1536] => Array
(
[file] => jpg-big-image-1536x1024.jpeg
[width] => 1536
[height] => 1024
[mime-type] => image/jpeg
)
[2048x2048] => Array
(
[file] => jpg-big-image-2048x1365.jpeg
[width] => 2048
[height] => 1365
[mime-type] => image/jpeg
)
)
[image_meta] => Array (
[aperture] => 11
[credit] =>
[camera] => NIKON D5300
=>
[created_timestamp] => 1413130422
[copyright] =>
[focal_length] => 31
[iso] => 320
[shutter_speed] => 0.002
[title] =>
[orientation] => 1
[keywords] => Array()
)
[original_image] => jpg-big-image.jpeg
)
_wp_attachment_backup_sizes -------------
пусто
*/
Функции вложений
Функции отвечающие за URL и пути вложений. Показана иерархия использования функций друг другом.
Группа:
Группа:
