json array to flatten tree for database

JSON_Array_To_Flatten

public $actsAs = array('Tree');

public function flattenJsonTree($JSON_array, $iParentId = null, $iLevel = null)
{
	$aRetval = array();
	$iPosition = 1;
	foreach ($JSON_array as $aChilds) {
		$aDescendents = array();
		if (isset($aChilds['children'])) {
			$aDescendents = $this->flattenJsonTree(
				$aChilds['children'], $aChilds['id'], $iLevel+1
				);
		}
		$aRetval[] = array(
			'id'  => $aChilds['id'],
			'parent_id'   => $iParentId,
			//'level'    => $iLevel,
			'order' => $iPosition++,
			);
		$aRetval = array_merge($aRetval, $aDescendents);
	}
	return $aRetval;
}