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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 |
|---|---|
| 3325 | } else { |
| 3326 | if ( $update ) { |
| 3327 | /** |
| 3328 | * Fires once an existing attachment has been updated. |
| 3329 | * |
| 3330 | * @since 2.0.0 |
| 3331 | * |
| 3332 | * @param int $post_ID Attachment ID. |
| 3333 | */ |
| 3334 | do_action( 'edit_attachment', $post_ID ); |
| 3335 | $post_after = get_post( $post_ID ); |
| 3336 | |
| 3337 | /** |
| 3338 | * Fires once an existing attachment has been updated. |
| 3339 | * |
| 3340 | * @since 4.4.0 |
| 3341 | * |
| 3342 | * @param int $post_ID Post ID. |
| 3343 | * @param WP_Post $post_after Post object following the update. |