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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 |
|---|---|
| 516 | * - `deleted_user_meta` |
| 517 | * |
| 518 | * @since 2.9.0 |
| 519 | * |
| 520 | * @param string[] $meta_ids An array of metadata entry IDs to delete. |
| 521 | * @param int $object_id ID of the object metadata is for. |
| 522 | * @param string $meta_key Metadata key. |
| 523 | * @param mixed $_meta_value Metadata value. |
| 524 | */ |
| 525 | do_action( "deleted_{$meta_type}_meta", $meta_ids, $object_id, $meta_key, $_meta_value ); |
| 526 | |
| 527 | // Old-style action. |
| 528 | if ( 'post' === $meta_type ) { |
| 529 | /** |
| 530 | * Fires immediately after deleting metadata for a post. |
| 531 | * |
| 532 | * @since 2.9.0 |
| 533 | * |
| 534 | * @param string[] $meta_ids An array of metadata entry IDs to delete. |
| Line | Code |
| 1053 | } |
| 1054 | |
| 1055 | // Run the query, will return true if deleted, false otherwise. |
| 1056 | $result = (bool) $wpdb->delete( $table, array( $id_column => $meta_id ) ); |
| 1057 | |
| 1058 | // Clear the caches. |
| 1059 | wp_cache_delete( $object_id, $meta_type . '_meta' ); |
| 1060 | |
| 1061 | /** This action is documented in wp-includes/meta.php */ |
| 1062 | do_action( "deleted_{$meta_type}_meta", (array) $meta_id, $object_id, $meta->meta_key, $meta->meta_value ); |
| 1063 | |
| 1064 | // Old-style action. |
| 1065 | if ( 'post' === $meta_type || 'comment' === $meta_type ) { |
| 1066 | /** |
| 1067 | * Fires immediately after deleting post or comment metadata of a specific type. |
| 1068 | * |
| 1069 | * The dynamic portion of the hook name, `$meta_type`, refers to the meta |
| 1070 | * object type (post or comment). |
| 1071 | * |