~~~ /** * 把返回的数据集转换成Tree * @param array $list 要转换的数据集 * @param string $pid parent标记字段 * @param string $level level标记字段 * @return array */ function list_to_tree($list, $pk = 'id', $pid = 'parentid', $child = '_child', $root = 0) { // 创建Tree $tree = array(); if (is_array($list)) { // 创建基于主键的数组引用 $refer = array(); foreach ($list as $key => $data) { $refer[$data[$pk]] = &$list[$key]; } foreach ($list as $key => $data) { // 判断是否存在parent $parentId = $data[$pid]; if ($root == $parentId) { $tree[] = &$list[$key]; } else { if (isset($refer[$parentId])) { $parent = &$refer[$parentId]; $parent[$child][] = &$list[$key]; } } } } return $tree; } ~~~