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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 4761 | delete_transient( 'dirsize_cache' ); |
| 4762 | |
| 4763 | /** |
| 4764 | * Fires before an attachment is deleted, at the start of wp_delete_attachment(). |
| 4765 | * |
| 4766 | * @since 2.0.0 |
| 4767 | * |
| 4768 | * @param int $post_id Attachment ID. |
| 4769 | */ |
| 4770 | do_action( 'delete_attachment', $post_id ); |
| 4771 | |
| 4772 | wp_delete_object_term_relationships($post_id, array('category', 'post_tag')); |
| 4773 | wp_delete_object_term_relationships($post_id, get_object_taxonomies($post->post_type)); |
| 4774 | |
| 4775 | // Delete all for any posts. |
| 4776 | delete_metadata( 'post', null, '_thumbnail_id', $post_id, true ); |
| 4777 | |
| 4778 | wp_defer_comment_counting( true ); |
| 4779 | |