PHP 数组转树结构/树结构转数组
#数组转树结构#
function list_to_tree($list, $root = 0, $pk = 'id', $pid = 'parent_id', $child = 'children')
{
// 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
$parentId = 0;
if (isset($data[$pid])) {
$parentId = $data[$pid];
}
if ((string)$root == $parentId) {
$tree[] = &$list[$key];
} else {
if (isset($refer[$parentId])) {
$parent = &$refer[$parentId];
$parent[$child][] = &$list[$key];
}
}
}
}
return $tree;
}
#树结构转数组#
function tree_to_list($tree = [], $children = 'children')
{
if (empty($tree) || !is_array($tree)) {
return $tree;
}
$arrRes = [];
foreach ($tree as $k => $v) {
$arrTmp = $v;
unset($arrTmp[$children]);
$arrRes[] = $arrTmp;
if (!empty($v[$children])) {
$arrTmp = tree_to_list($v[$children]);
$arrRes = array_merge($arrRes, $arrTmp);
}
}
return $arrRes;
}
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