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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 |
|---|---|
| 4564 | } else { |
| 4565 | if ( $update ) { |
| 4566 | /** |
| 4567 | * Fires once an existing attachment has been updated. |
| 4568 | * |
| 4569 | * @since 2.0.0 |
| 4570 | * |
| 4571 | * @param int $post_ID Attachment ID. |
| 4572 | */ |
| 4573 | do_action( 'edit_attachment', $post_ID ); |
| 4574 | |
| 4575 | $post_after = get_post( $post_ID ); |
| 4576 | |
| 4577 | /** |
| 4578 | * Fires once an existing attachment has been updated. |
| 4579 | * |
| 4580 | * @since 4.4.0 |
| 4581 | * |
| 4582 | * @param int $post_ID Post ID. |