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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 |
|---|---|
| 3445 | } else { |
| 3446 | if ( $update ) { |
| 3447 | /** |
| 3448 | * Fires once an existing attachment has been updated. |
| 3449 | * |
| 3450 | * @since 2.0.0 |
| 3451 | * |
| 3452 | * @param int $post_ID Attachment ID. |
| 3453 | */ |
| 3454 | do_action( 'edit_attachment', $post_ID ); |
| 3455 | $post_after = get_post( $post_ID ); |
| 3456 | |
| 3457 | /** |
| 3458 | * Fires once an existing attachment has been updated. |
| 3459 | * |
| 3460 | * @since 4.4.0 |
| 3461 | * |
| 3462 | * @param int $post_ID Post ID. |
| 3463 | * @param WP_Post $post_after Post object following the update. |