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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 |
---|---|
4590 | /** |
4591 | * Fires once an existing attachment has been updated. |
4592 | * |
4593 | * @since 4.4.0 |
4594 | * |
4595 | * @param int $post_ID Post ID. |
4596 | * @param WP_Post $post_after Post object following the update. |
4597 | * @param WP_Post $post_before Post object before the update. |
4598 | */ |
4599 | do_action( 'attachment_updated', $post_ID, $post_after, $post_before ); |
4600 | } else { |
4601 |
|
4602 | /** |
4603 | * Fires once an attachment has been added. |
4604 | * |
4605 | * @since 2.0.0 |
4606 | * |
4607 | * @param int $post_ID Attachment ID. |
4608 | */ |