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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 |
|---|---|
| 6399 | /** |
| 6400 | * Filters whether an attachment deletion should take place. |
| 6401 | * |
| 6402 | * @since 5.5.0 |
| 6403 | * |
| 6404 | * @param WP_Post|false|null $delete Whether to go forward with deletion. |
| 6405 | * @param WP_Post $post Post object. |
| 6406 | * @param bool $force_delete Whether to bypass the Trash. |
| 6407 | */ |
| 6408 | $check = apply_filters( 'pre_delete_attachment', null, $post, $force_delete ); |
| 6409 | if ( null !== $check ) { |
| 6410 | return $check; |
| 6411 | } |
| 6412 | |
| 6413 | delete_post_meta( $post_id, '_wp_trash_meta_status' ); |
| 6414 | delete_post_meta( $post_id, '_wp_trash_meta_time' ); |
| 6415 | |
| 6416 | $meta = wp_get_attachment_metadata( $post_id ); |
| 6417 | $backup_sizes = get_post_meta( $post->ID, '_wp_attachment_backup_sizes', true ); |