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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 |
---|---|
454 | * (post, comment, term, user, or any other type with an associated meta table). |
455 | * |
456 | * @since 2.9.0 |
457 | * |
458 | * @param string[] $meta_ids An array of metadata entry IDs to delete. |
459 | * @param int $object_id ID of the object metadata is for. |
460 | * @param string $meta_key Metadata key. |
461 | * @param mixed $_meta_value Metadata value. Serialized if non-scalar. |
462 | */ |
463 | do_action( "deleted_{$meta_type}_meta", $meta_ids, $object_id, $meta_key, $_meta_value ); |
464 |
|
465 | // Old-style action. |
466 | if ( 'post' === $meta_type ) { |
467 | /** |
468 | * Fires immediately after deleting metadata for a post. |
469 | * |
470 | * @since 2.9.0 |
471 | * |
472 | * @param string[] $meta_ids An array of metadata entry IDs to delete. |
Line | Code |
956 | } |
957 |
|
958 | // Run the query, will return true if deleted, false otherwise. |
959 | $result = (bool) $wpdb->delete( $table, array( $id_column => $meta_id ) ); |
960 |
|
961 | // Clear the caches. |
962 | wp_cache_delete( $object_id, $meta_type . '_meta' ); |
963 |
|
964 | /** This action is documented in wp-includes/meta.php */ |
965 | do_action( "deleted_{$meta_type}_meta", (array) $meta_id, $object_id, $meta->meta_key, $meta->meta_value ); |
966 |
|
967 | // Old-style action. |
968 | if ( 'post' === $meta_type || 'comment' === $meta_type ) { |
969 | /** |
970 | * Fires immediately after deleting post or comment metadata of a specific type. |
971 | * |
972 | * The dynamic portion of the hook, `$meta_type`, refers to the meta |
973 | * object type (post or comment). |
974 | * |