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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.
This hook occurs 2 times in this file.
| Line | Code |
|---|---|
| 275 | * Fires immediately after updating a post's metadata. |
| 276 | * |
| 277 | * @since 2.9.0 |
| 278 | * |
| 279 | * @param int $meta_id ID of updated metadata entry. |
| 280 | * @param int $object_id Object ID. |
| 281 | * @param string $meta_key Meta key. |
| 282 | * @param mixed $meta_value Meta value. |
| 283 | */ |
| 284 | do_action( 'updated_postmeta', $meta_id, $object_id, $meta_key, $meta_value ); |
| 285 | } |
| 286 | } |
| 287 | |
| 288 | return true; |
| 289 | } |
| 290 | |
| 291 | /** |
| 292 | * Delete metadata for the specified object. |
| 293 | * |
| Line | Code |
| 670 | |
| 671 | // Clear the caches. |
| 672 | wp_cache_delete($object_id, $meta_type . '_meta'); |
| 673 | |
| 674 | /** This action is documented in wp-includes/meta.php */ |
| 675 | do_action( "updated_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value ); |
| 676 | |
| 677 | if ( 'post' == $meta_type ) { |
| 678 | /** This action is documented in wp-includes/meta.php */ |
| 679 | do_action( 'updated_postmeta', $meta_id, $object_id, $meta_key, $meta_value ); |
| 680 | } |
| 681 | |
| 682 | return true; |
| 683 | } |
| 684 | |
| 685 | // And if the meta was not found. |
| 686 | return false; |
| 687 | } |
| 688 | |