wp_find_hierarchy_loop()
Finds hierarchy loops using a callback function that maps object IDs to parent IDs.
Internal function — this function is designed to be used by the kernel itself. It is not recommended to use this function in your code.
No Hooks.
Return
Array
. IDs of all members of loop.
Usage
wp_find_hierarchy_loop( $callback, $start, $start_parent, $callback_args );
- $callback(callable) (required)
- Function that accepts ( ID, $callback_args ) and outputs parent_ID.
- $start(int) (required)
- The ID to start the loop check at.
- $start_parent(int) (required)
- The parent_ID of $start to use instead of calling $callback( $start ). Use null to always use $callback.
- $callback_args(array)
- Additional arguments to send to $callback.
Default: empty array
Changelog
Since 3.1.0 | Introduced. |
wp_find_hierarchy_loop() wp find hierarchy loop code WP 6.4.3
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 ); }