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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 |
|---|---|
| 4782 | } else { |
| 4783 | if ( $update ) { |
| 4784 | /** |
| 4785 | * Fires once an existing attachment has been updated. |
| 4786 | * |
| 4787 | * @since 2.0.0 |
| 4788 | * |
| 4789 | * @param int $post_id Attachment ID. |
| 4790 | */ |
| 4791 | do_action( 'edit_attachment', $post_id ); |
| 4792 | |
| 4793 | $post_after = get_post( $post_id ); |
| 4794 | |
| 4795 | /** |
| 4796 | * Fires once an existing attachment has been updated. |
| 4797 | * |
| 4798 | * @since 4.4.0 |
| 4799 | * |
| 4800 | * @param int $post_id Post ID. |