WordPress函数wp_generate_attachment_metadata根据附件ID生成该附件的Meta数据，如果附件类型为图片类型，且$file参数的值不为空，该函数还会创建对应的缩略图版本。
wp_generate_attachment_metadata( int $attachment_id, string $file )
函数参数
$attachment_id
整数
附件的ID
$file
字符串
文件路径
函数返回值
Array
(
[width] => 768
[height] => 430
[file] => 2020/05/baidusrf-for-linux.webp
[sizes] => Array
(
[thumbnail] => Array
(
[file] => baidusrf-for-linux-320x200.jpg
[width] => 320
[height] => 200
[mime-type] => image/webp
)
)
[image_meta] => Array
(
[aperture] => 0
[credit] =>
[camera] =>
=>
[created_timestamp] => 0
[copyright] =>
[focal_length] => 0
[iso] => 0
[shutter_speed] => 0
[title] =>
[orientation] => 0
[keywords] => Array
(
)
)
)
函数使用示例
扩展阅读
wp_generate_attachment_metadata()函数位于：wp-admin/includes/image.php
相关函数：
- wp_ajax_crop_image()
- wp_attachment_is()
- wp_create_image_subsizes()
- wp_get_registered_image_subsizes()
- wp_get_attachment_metadata()
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