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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 |
---|---|
424 | * object type (comment, post, term, or user). |
425 | * |
426 | * @since 2.9.0 |
427 | * |
428 | * @param array $meta_ids An array of deleted metadata entry IDs. |
429 | * @param int $object_id Object ID. |
430 | * @param string $meta_key Meta key. |
431 | * @param mixed $meta_value Meta value. |
432 | */ |
433 | do_action( "deleted_{$meta_type}_meta", $meta_ids, $object_id, $meta_key, $_meta_value ); |
434 |
|
435 | // Old-style action. |
436 | if ( 'post' == $meta_type ) { |
437 | /** |
438 | * Fires immediately after deleting metadata for a post. |
439 | * |
440 | * @since 2.9.0 |
441 | * |
442 | * @param array $meta_ids An array of deleted post metadata entry IDs. |
Line | Code |
801 | } |
802 |
|
803 | // Run the query, will return true if deleted, false otherwise |
804 | $result = (bool) $wpdb->delete( $table, array( $id_column => $meta_id ) ); |
805 |
|
806 | // Clear the caches. |
807 | wp_cache_delete($object_id, $meta_type . '_meta'); |
808 |
|
809 | /** This action is documented in wp-includes/meta.php */ |
810 | do_action( "deleted_{$meta_type}_meta", (array) $meta_id, $object_id, $meta->meta_key, $meta->meta_value ); |
811 |
|
812 | // Old-style action. |
813 | if ( 'post' == $meta_type || 'comment' == $meta_type ) { |
814 | /** |
815 | * Fires immediately after deleting post or comment metadata of a specific type. |
816 | * |
817 | * The dynamic portion of the hook, `$meta_type`, refers to the meta |
818 | * object type (post or comment). |
819 | * |