Trees

RedBeanPHP also supports trees. Here is an example of a tree in RedBeanPHP:

R::attach($father,$daughter);
R::attach($father,$son);
$children = R::children( $father );
$father = R::getParent( $son );

To attach a child bean to a parent bean say:

R::attach( $parent, $child );

To get all the children under a parent:

$pages = R::children( $parent );

To get the parent id of a child bean, simply access the property parent_id:

$child->parent_id