/**

 * @Description: 无限极分类一

 * @Author: Yang

 * @param $data  数据库数据

 * @param int $parent_id   父级ID

 * @return array

 */

function getTree1($data, $parent_id = 0)

{

    $tree = array();

    foreach ($data as $k => $v) {

        if ($v["parent_id"] == $parent_id) {

            unset($data[$k]);

            if (!empty($data)) {

                $children = getCategory($data, $v["id"]);

                if (!empty($children)) {

                    $v["_child"] = $children;

                }

            }

            $tree[] = $v;

        }

    }

    return $tree;

}

/**

 * @Description: 无限极分类二

 * @Author: Yang

 * @param $data   数据库数据

 * @param int $parent_id  父级ID

 * @param int $level  等级

 * @return array

 */

function getTree2($data, $parent_id = 0, $level = 0)

{

    static $tree = array();

    foreach ($data as $k => $v) {

        if ($v["parent_id"] == $parent_id) {

            $v["level"] = $level;

            $tree[] = $v;

            getTree($data, $v["id"], $level + 1);

        }

    }

    return $tree;

}

/**

 * @Description: 无限分类三：面包屑导航

 * @Author: Yang

 * @param $data  数据库数据

 * @param $id    分类ID

 * @return array

 */

function getCrumbsBar($data, $id) {

    static $tree = array();

    foreach ($data as $k => $v) {

        if ($v["id"] == $id) {

            getCrumbsBar($data, $v["parent_id"]);

            $tree[] = $v;

        }

    }

    return $tree;

}