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$arr = [
[
'id' => 1,
'parentId' => -1,
'name' => '广东省',
],
[
'id' => 2,
'parentId' => 1,
'name' => '深圳市',
],
[
'id' => 3,
'parentId' => 2,
'name' => '南山区',
],
[
'id' => 4,
'parentId' => 3,
'name' => '粤海街道办',
],
[
'id' => 5,
'parentId' => -1,
'name' => '江西省',
],
[
'id' => 6,
'parentId' => 5,
'name' => '吉安市',
],
[
'id' => 7,
'parentId' => 6,
'name' => '吉州区',
],
[
'id' => 8,
'parentId' => 7,
'name' => '河东街道办',
],
[
'id' => 9,
'parentId' => 3,
'name' => '西丽街道办',
],
[
'id' => 10,
'parentId' => 7,
'name' => '文山街道办',
],
[
'id' => 11,
'parentId' => 6,
'name' => '青原区',
]
];
//提取id为键
function changeData($data)
{
$lists = [];
foreach ($data as $k => $v) {
$lists[$v['id']] = $v;
}
return $lists;
}
//父级查询子级
function getParent($data)
{
$list = changeData($data);
$tree = [];
foreach ($list as $k) {
if (isset($list[$k['parentId']]) && $k['parentId'] != -1) {
$list[$k['parentId']]['items'][$k['id']] =& $list[$k['id']];
} else {
$tree[$k['id']] =& $list[$k['id']];
}
}
return $tree;
}
//子级查询父级
function getChild($data)
{
$list = changeData($data);
$tree = [];
foreach ($list as $k => $v) {
if ($v['parentId'] != -1) {
$list[$v['id']]['items'][$v['parentId']] =& $list[$v['parentId']];
} else {
$tree =& $list;
}
}
return $tree;
}
//组合子级到父级关系
function getData($gets)
{
$list = [];
$tem = '';
foreach ($gets as $k => $v) {
if ($v['parentId'] != -1) {
$temp = $v['name'];
if (count($v['items']) > 0) {
$tem = $v['items'][$v['parentId']]['name'];
if (count($v['items'][$v['parentId']]['items']) > 0) {
$tp = getData($v['items'][$v['parentId']]['items']);
}
}
if (empty($tem)) {
$tems = $v['name'];
} else {
$tems = $temp . '->' . $tem;
}
if (count($tp) > 0) {
$list[] = $tems . '->' . $tp[0];
unset($tp);
} else {
$list[] = $tems;
}
} else {
$list[] = $v['name'];
}
}
return $list;
}
$gets = getChild($arr);;
$ss = getData($gets);
print_r($ss);
exit;
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