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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 |
---|---|
6395 | /** |
6396 | * Fires before an attachment is deleted, at the start of wp_delete_attachment(). |
6397 | * |
6398 | * @since 2.0.0 |
6399 | * @since 5.5.0 Added the `$post` parameter. |
6400 | * |
6401 | * @param int $post_id Attachment ID. |
6402 | * @param WP_Post $post Post object. |
6403 | */ |
6404 | do_action( 'delete_attachment', $post_id, $post ); |
6405 |
|
6406 | wp_delete_object_term_relationships( $post_id, array( 'category', 'post_tag' ) ); |
6407 | wp_delete_object_term_relationships( $post_id, get_object_taxonomies( $post->post_type ) ); |
6408 |
|
6409 | // Delete all for any posts. |
6410 | delete_metadata( 'post', null, '_thumbnail_id', $post_id, true ); |
6411 |
|
6412 | wp_defer_comment_counting( true ); |
6413 |
|