WordPress删除文章时,文章内所上传到媒体库的图片等附件不会自动删除,占用了网站空间,因此下面说明通过几行代码的简单方式实现在删除文章时自动删除缩略图以及图片附件,这样就不用手动去媒体库寻找并删除,准确而且效率高。
功能实现代码
-
- function delete_post_and_attachments($post_ID) {
- global $wpdb;
-
- $thumbnails = $wpdb->get_results( "SELECT * FROM $wpdb->postmeta WHERE meta_key = '_thumbnail_id' AND post_id = $post_ID" );
- foreach ( $thumbnails as $thumbnail ) {
- wp_delete_attachment( $thumbnail->meta_value, true );
- }
-
- $attachments = $wpdb->get_results( "SELECT * FROM $wpdb->posts WHERE post_parent = $post_ID AND post_type = 'attachment'" );
- foreach ( $attachments as $attachment ) {
- wp_delete_attachment( $attachment->ID, true );
- }
- $wpdb->query( "DELETE FROM $wpdb->postmeta WHERE meta_key = '_thumbnail_id' AND post_id = $post_ID" );
- }
- add_action('before_delete_post', 'delete_post_and_attachments');
使用方法
将上述代码放到主题functions.php文件的最下面即可添加成功
注意事项
当你在删除文章时先执行函数内容,删除特色图片以及图片附件,但是如果在使用 action delete_post
而不是 before_delete_post
将导致删除文章后因媒体附件与文章关联已取消而无法正确删除。