Alert: This function’s access is marked private. This means it is not intended for use by plugin or theme developers, only in other core functions. It is listed here for completeness.
wp_find_hierarchy_loop( callable $callback, int $start, int $start_parent, array $callback_args = array() ): array
Finds hierarchy loops using a callback function that maps object IDs to parent IDs.
Parameters
-
$callbackcallable Required -
Function that accepts ( ID, $callback_args ) and outputs parent_ID.
-
$startint Required -
The ID to start the loop check at.
-
$start_parentint Required -
The parent_ID of $start to use instead of calling $callback( $start ).
Use null to always use $callback. -
$callback_argsarray Optional -
Additional arguments to send to $callback.
Default:
array()
Return
array IDs of all members of loop.
Source
File: wp-includes/functions.php.
View all references
function wp_find_hierarchy_loop( $callback, $start, $start_parent, $callback_args = array() ) {
$override = is_null( $start_parent ) ? array() : array( $start => $start_parent );
$arbitrary_loop_member = wp_find_hierarchy_loop_tortoise_hare( $callback, $start, $override, $callback_args );
if ( ! $arbitrary_loop_member ) {
return array();
}
return wp_find_hierarchy_loop_tortoise_hare( $callback, $arbitrary_loop_member, $override, $callback_args, true );
}
Changelog
| Version | Description |
|---|---|
| 3.1.0 | Introduced. |