/**
* @param array $list 要转换的结果集
* @param string $pid parent标记字段
* @param string $level level标记字段
*/
function list_to_tree($list, $pk='id', $pid = 'pid', $child = 'listArea', $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
$parantId = $data[$pid];
if ($root == $parantId) {
$tree[] = &$list[$key];
} else {
if (isset($refer[$parantId])) {
$parent = &$refer[$parantId];
$parent[$child][] = &$list[$key];
}
}
}
}
return $tree;
}
$menuList = list_to_tree($menu);
![](https://images2018.cnblogs.com/blog/771862/201809/771862-20180913112922646-1725500010.jpg)