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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 |
|---|---|
| 3853 | } else { |
| 3854 | if ( $update ) { |
| 3855 | /** |
| 3856 | * Fires once an existing attachment has been updated. |
| 3857 | * |
| 3858 | * @since 2.0.0 |
| 3859 | * |
| 3860 | * @param int $post_ID Attachment ID. |
| 3861 | */ |
| 3862 | do_action( 'edit_attachment', $post_ID ); |
| 3863 | $post_after = get_post( $post_ID ); |
| 3864 | |
| 3865 | /** |
| 3866 | * Fires once an existing attachment has been updated. |
| 3867 | * |
| 3868 | * @since 4.4.0 |
| 3869 | * |
| 3870 | * @param int $post_ID Post ID. |
| 3871 | * @param WP_Post $post_after Post object following the update. |